10 Best Harem/ Ecchi Anime That You Should Definitely Watch in 2021 Winter, Spring, Summer, Fall

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Every time I decide to write an upcoming ecchi list I am instantly sad – and for a good reason, there is just simply not enough ecchi to pick from!

But we have to work with what we have at our disposal, so I did my best to dig out the top 6 ecchi for you!

⌈4⌋ High School DxD

the-20-sexiest-ecchi-harem-anime-list
  • Episodes: 48 / Four Seasons
  • Studio: TNK
  • Genres: Comedy, Demons, Ecchi, Harem, Romance, School

 

Synopsis:

High School DxD is one the most popular anime of all time, it’s a good ecchi harem anime filled with pretty girls, especially the hot rias Gregory.

the story follows the student Issei Hyoudou who is a pervert.

He does nothing productive with his life, peeping on women and dreaming of having his own harem one day.

Things seem to be looking up for Issei when the pretty rias ask him out on a date.

although she turns out to be a fallen angel who brutally kills him!

However, he gets a second chance at life when Rias Gremory, who is a top-class devil, revives him as her servant.

Now, Issei must train and fight in order to survive in the violent world of angels and devils.

Any given adventure leads to many hilarious and epic moments with his new comrades.

all the while keeping his new life a secret from his friends and family in High School DxD!

⌈3⌋ Sora no Otoshimono

best-ecchi-anime-movies

Heaven’s Lost Property is a 2011 ecchi harem anime and is an AIC A.S.T.A. Studio Production.

Genre:  Comedy, Drama, Ecchi, Harem, Romance, Sci-Fi, Shounen, Supernatural

Synopsis

For as long as he can remember, Tomoki Sakurai has woken up crying to the same dream: an angel he has never met disappearing into the skies, saying, “The sky has captured me.”

But one day, the dream is different.

Now, the angel descends from the skies, desperately asking Tomoki for his help.

After falling asleep in class, his childhood friend Sohara Mitsuki wakes him up and notices the tears in his eyes.

Worried, she has him consult Eishirou Sugata, their eccentric upperclassman who is obsessed with “The New Continent”—a flying anomaly whose existence no-one can explain.

With the anomaly set to pass over their town, Sugata decides the trio should meet up at midnight in a bid to solve Tomoki’s dream as well as gather more information on The New Continent.

Being the only one who showed up, Tomoki is about to leave when an angeloid falls from the sky and binds herself to him, declaring him her master.

Shortly after, Sohara forces him to join the New Continent Discovery Club, whose sole member is Sugata.

Together, they work to uncover the secrets behind The New Continent, angeloids, and the girl behind his dreams—but what they discover may be much more sinister than what anyone expected…

 


 

⌈2⌋ To Love-Ru

to-love-ru

  • Episodes: 62 / Four Seasons
  • Studio: Xebec
  • Genres: Sci-Fi, Harem, Comedy, Romance, Ecchi, School, Shounen

Synopsis:

Rito Yuuki is a shy boy attempts to confess his love to his crash since junior high and classmate Haruna Sairenji.

Unfortunately, his situation becomes even more challenging when one night, a mysterious girl crash-lands right on top of a bathing Rito.

Furthermore, Rito is in more confusion when he discovers that this girl, is the crown princess of an alien empire who left her home.

Despite being a princess of a powerful planet, the girl wants to marry the timid Rito in order to avoid an unwanted political marriage.

To LOVE-Ru in an ecchi harem anime that depicts Rito’s daily struggles with the bizarre chaos that begins upon the arrival of a mysterious girl.


 

⌈1⌋ Isekai no Seikishi Monogatari

harem-anime-with-op-mc

  • Episodes: 13
  • Studios: AIC, BeSTACK
  • Genres: Action, Comedy, Ecchi, Fantasy, Harem, Mecha, School

 

Summary:

Tenchi Muyo! “War on Geminar” is one of the top ecchi harem anime series where the Op Mc that you will really love.
the story revolves around Kenshi Masaki who finds himself in another world.

To get back home, he agrees to help them assassinate the new empress of the Shtrayu Empire, Lashara Aasu XXVIII.

As her army fights them off, Lashara takes note of Kenshi’s abilities and demands that her attacker be captured alive.

only to find out that the pilot is male which is extremely rare on Geminar.

Believing it to be a waste to kill him, she makes Kenshi her attendant.

As the empress’ new servant, Kenshi must accompany Lashara to the Holy Land, an academy where Mechanoid pilots hone their skills.

His arrival attracts attention, but Kenshi is unaware that something sinister is brewing within the academy and it could plunge the entire world into war.
6. Plunderer

Genres: Action, Ecchi, Fantasy, Shounen, Sci Fi, Adventure, Mystery, Drama, Fantasy

Episodes: Unknown

Airing: Jan 2020 to ?

The story takes place in a post-apocalyptic world which is dominated by “Numbers”. Every human has their identity tied to their own “Count” which relates to any number related to their life. If the count reaches zero it leads them to the abyss.

In the year 305 of the Alcian calendar, Hina is determined to search for the Legendary Red Baron as per the last wish of her mother whos count reached zero. Whilst on her missions, she meets a mysterious, half-masked swordsman named Licht.

5. Strike the Blood IV

Genres:  Action, Supernatural, Ecchi, Vampire, Fantasy

Episodes: 12

Airing: Mar 25, 2020 to ?

Strike the Blood IV will be completed with 6 volumes and continue right where Strike the Blood III let off.

⌈16⌋ Monster Musume no Iru Nichijou

the-20-sexiest-ecchi-harem-anime-list

How Many Episodes: 12

Synopsis:

Kimihito Kurusu is living a life where he’s the man of the house–a house full of irresistible monster girls.

What’s a young man to do while his parents are abroad?

Welcome to progressive Japan, where non-human species are allowed to mix and mingle with daily society! But before you get any naughty thoughts, the Interspecies Exchange Act prohibits any sort of sensual interaction between two species.

Think the law will stop Kimihito and his newfound abnormal harem? There’s always a loophole.


⌈15⌋ Trinity Seven

Anime-Where-the-MC--Badass-Transfe-Student

  • Genres: Action, Harem, Comedy, Supernatural, Magic, Romance, Ecchi, Fantasy, School
  • Studios: Seven Arcs Pictures
  • Episodes:  12

Summary:

In this romantic comedy magic Ecchi harem anime, the story focuses on Arata Kasuga who suddenly sees his life wiped out by a bizarre incident known as “Collapse Phenomenon,”.

This phenomenon causes worldwide destruction and takes his cousin Hijiri Kasuga to another world.

To solve the mystery of the “Collapse Phenomenon” and bring back Hijiri, Arata enrolls in the Royal Biblia Academy.

Hence, in this Academy, there are seven beautiful female magic users, who will help Arata in his mission.


⌈14⌋ Strike the Blood

strike-the-blood

  • Episodes: 24
  • Studios: Silver Link., Connect
  • Genres: Action, Harem, Supernatural, Ecchi, Vampire, Fantasy, School

 

Summary:

Kojou Akatsuki’s days as an ordinary high school student, who during a fateful encounter leaves him with the remarkable abilities of a vampire.

It isn’t long before he is thrust into the center of attention when it is discovered that he is the fourth primogenitor.

Fearing Kojou’s destructive potential, the Lion King Organization sends in an apprentice sword-shaman.

Yukina Himeragi, must monitor, and should he become a threat, she must kill the boy deemed the world’s most powerful vampire.

The Anime highlights the two, who forms an unlikely alliance as the mc Kojou comes to terms with his abilities and ready to unleash his power to save his lover and they struggles to keep the city safe from various emerging chaotic forces.


⌈13⌋ Sekirei

best-ecchi-anime

  • Episodes: 25 / Two Seasons
  • Studios: Seven Arcs
  • Genres: Action, Comedy, Ecchi, Harem, Super Power

Synopsis:

Minato Sahashi fails in his college entrance exams for the second time, resulting in him being regarded as worthless by those around him.

However, the course of his seemingly bleak future changes dramatically when a beautiful, supernatural woman falls from the sky and into his life.

That woman, Musubi, is a unique being known as a “Sekirei,” a humanoid extraterrestrial with extraordinary abilities.

These aliens are known for kissing humans carrying the Ashikabi gene in order to awaken additional latent powers deep within.

Musubi kisses the bewildered Minato, initiating a bond between the two of them.

This drags him into the high-stakes world of the Sekirei.

where he and his new partner must compete against others in a battle for survival called the “Sekirei Plan.”

However, unbeknownst to the contestants, there is far more at risk than what the competition initially entailed.

4. Ishuzoku Reviewers

Genres:  Comedy, Ecchi, Fantasy

Episodes: Unknown

Airing: Jan, 2020 to ?

The anime is set in a world where multiple humanoid species coexist. On top of that, prostituion is legal here.

Stunk, the main character comes from the human race and one day decides that he really wants to end the debate about who is the best woman out of all existing species – but that would not work without exploring different girls, opinions and this wonderful fantasy world!

3. Hatena☆ Ilusion

Genres:  Comedy, Supernatural, Romance, Ecchi

Episodes: Unknown

Airing: Jan, 2020 to ?

Makoto has always been an admirer of a renowned magician Mamoru, dreaming of becoming like him.

Thanks to the friendship of Makoto’s parents with Mamoru’s family Makoto becomes an apprentice and moves to Tokyo only to find out that Kana, his childhood friend, and Mamoru’s daughter has changed a lot and they do not get along very well after all.

2. Overflow

Genres:  Romance, Ecchi

Episodes: Unknown

Airing: Jan, 6 2020 to ?

The main character, Sadai Tsukuda gets to experience bath with not only his sister but also with his childhood friend. That will certainly jumpstart a rollercoaster of events!

1. Dungeon ni Deai wo Motomeru no wa Machigatteiru Darouka II OVA

Genres:  Adventure, Comedy, Romance, Ecchi, Fantasy

Episodes: 1

Airing: Jan, 29, 2020 to ?

The anime OVA is set on a secluded island and includes exclusive vacation experiences of The Hestia Familia adventurers together with another adventurer who helped them out, Ryuu.

⌈20⌋ Freezing

 

freezing-anime

  • Studio: A.C.G.T
  • Genres: Action, Military, Sci-Fi, Harem, Drama, Romance, Ecchi, Martial Arts, Seinen
Synopsis:
This ecchi harem anime takes place in the future, where humans are under siege by an alien race a.k.a Novas.
These aliens leave devastation in their wake whenever they appear, with the efforts to stave them off becoming known as Nova Clashes.

Girls  “Pandoras” and Boys “Limiters” are implanted with stigmata to give them superpowers and are trained in military academies, where they learn how to work as a team if humanity is to have a chance of surviving.

Freezing focus on Kazuya Aoi as debut his first day at the West Genetics military academy, right when a battle royale is being undertaken by the Pandoras.

However, he mistakes a powerful Pandora known as the “Untouchable Queen”—as his deceased sister and embraces her.
Hence, Though he costs her the match, she finds that his touch doesn’t drive her away and decides to take him as her Limiter.
So, The only question is whether or not they can survive the machinations of their upperclassmen and the impending battle with the Novas…

⌈19⌋ Rosario to Vampire

anime-romance

  • Genres: Harem, Comedy, Romance, Ecchi, Vampire, Fantasy, School, Shounen
  • Studios:  Gonzo

⇓ Synopsis ⇓

Youkai Academy is a seemingly normal boarding school, except that its pupils are monsters learning to coexist with humans.

Likewise, all students attend in human form and take normal academic subjects, such as literature, gym, foreign language, and mathematics.

However, there is one golden rule at Youkai Academy—all humans found on school grounds are to be executed immediately!

Tsukune Aono is an average teenager who is unable to get into any high school because of his bad grades.

His parents inadvertently enroll him into Youkai Academy as a last-ditch effort to secure his education.

As Tsukune unknowingly enters this new world, he has a run-in with the most attractive girl on campus, Moka Akashiya.

Deciding to stay in the perilous realm in order to further his relationship with Moka.

However, he does not realize that beneath her beauty lies a menacing vampire.

 

⌈18⌋ Ichiban Ushiro no Daimaou

Hagure Yuusha no Aesthetica

  • Genres: Action, Harem, Comedy, Magic, Ecchi, Fantasy, School
  • Studios: Artland

Summary:

This Action Comedy Magic ecchi harem Anime follows One of the most promising overpowered transfer students in the Wizard academy.

His name is Akuto Sai who takes a career assessment test and the results say that he’ll become a demon king.

The students treat him differently after this, Moreover, he is surrounded by a harem of beautiful girls who each have their own plans for him.

With his newly awakened powers, Akuto must cope with his constantly growing list of misfortune and fight to prove that his fate is not to be evil.

Campione!

the-20-sexiest-ecchi-harem-anime-list

  • Studio: Diomedea
  • Genres: Comedy, Ecchi, Fantasy, Harem, Magic, Romance

 

Synopsis:

Kusanagi Godou is suddenly stuck with the unwanted position of Campione!, or God Slayer, who must fight Heretical Gods whenever they try to muscle in on the local turf.

Not only is this likely to make Godou roadkill on the Highway to Heaven, it’s also a job that comes with a lot of other problems.

Like how to deal with the fact that as a Campione, he is now attracting multiple pretty female followers.

After all, they’re just there to aid him in his demi-godly duties, right?

So why is it that their leader, the sword-mistress Erica Blandelli, seems to have such a devilish interest in encouraging some VERY unorthodox activities?

So, Get ready for immortal affairs, heavenly beautiful harems and lots of dueling deities taking pious in the face as the ultimate smash, bash and thrash of the Titans rocks both Heaven and Earth.

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