Ecchi anime take things even further than the harem genre. However, it still has a cult following in the anime community. So, we've compiled a list of the best ecchi anime with an overpowered (OP) main character.
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Trinity Seven
First on the list is Trinity Seven, which follows the life of Arata Kasuga. After the Breakdown Phenomenon, the sun stopped shining leading to the annihilation of Arata’s town.
However, it is not the end. Arata’s childhood friend and a cousin named Hijiri Kasuga gives him a magical grimoire that can be used to artificially revive the town.
Lilith Asami is sent to investigate the recent events. Lilith meets Arata whose artificial town has suddenly disappeared.
She gives him two choices – hand over the grimoire or perish. He chooses the third one and joins Royal Biblia Academy, a covert magic school.
At the academy, he meets six other magic users. He joins forces with Lilith and the others to form Trinity Seven.
Arata aims to save Hijiri and assist his new friends. He also hopes to stop the destruction of his town and bring back his friends.
No Game, No Life
Sixteen sentient races make Disboard and it is overseen by the One True God – Tet. Imanity is the lowest of the sixteen consisting of humans.
Meanwhile, in Disboard, everything is decided through games, and humans, who lack magic, are grossly underprepared.
However, the arrival of two outsiders is set to change the destiny of humans. On planet Earth, Sora and Shiro are two shut-ins who rule several online games as Blank.
One day, they respond to a mysterious message from an unknown user and get transported to Disboard. Turns out the sender was Tet.
The One True God informs the duo about the absolute rules of the world and leaves. Shiro and Sora start their search to find a place to stay.
The pair reaches Elkia which is the last remaining kingdom of Imanity. There, they meet with Stephanie Dola who is aiming for the sovereignty of the kingdom.
In a desperate attempt, she tries to regain the kingdom’s throne but fails miserably. Sora and Shiro are moved by her determination and decide to help her.
Can they help Stephanie bring back the glorious days of Elkia?
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IS: Infinite Stratos
Japan has engineered an immensely powerful exoskeleton weapon named Infinite Stratos that can only be piloted by women.
The combat ability of this weapon reaches a dangerous level and an international treaty is signed seeking to ban its military use.
Meanwhile, the military learns about a 15-year-old boy named Ichika Orimura who can steer an Infinite Stratos.
He is forced to join the Infinite Stratos Academy, which is an all-girls boarding school.
At the academy, he reunites with two of his childhood friends – Lingyin Huang and Houki Shinonono. He also becomes friends with Cecilia Alcott, a rep from the UK.
Now Ichika starts his journey and uses everything he has to defend the academy from various obstacles.
This mecha anime then shows Ichika becoming an overpowered character while getting all the female attention.
Sekirei
19-year-old Minato Sahashi is struggling to clear his college entrance exam. After failing for the second time, he is called worthless by people around him.
However, things take a drastic turn when a supernatural damsel appears before him. She is Musubi, a Sekirei, who is a humanoid extraterrestrial with unique abilities.
When Musubi kisses a human with the Ashikabi gene, the innate powers in the human awaken.
Musubi sees the inherent potential in Minato because he is carrying the same gene. She kisses Minato awakening his latent powers and the two start to bond.
After the kiss, Minato is pushed into the world of the Sekirei. He and Musubi compete with others in various battles for survival.
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The Hidden Dungeon Only I Can Enter
Noir Stalgia is a noble but is placed at the bottom of the hierarchy. His fellow nobles bully him because of his status.
However, he has the unique ability to get in touch with the Great Sage. This oracle answers all of Noir’s questions.
After Noir fails to get a job in the library, he decides to join the Hero Academy. He is aware that he needs to get stronger before joining the academy.
The Great Sage suggests that he must explore the deep dungeon situated in the mountains.
In the dungeon, he crosses paths with Olivia Servant, a beautiful woman trapped in the depths of the labyrinth.
Olivia presents Noir with an incredibly powerful set of skills that allows him to take control over things.
However, there is a catch, every time he uses his newfound powers, his life points go down.
In order to replenish his energy, he needs to indulge in worldly pleasures like kissing his best friend.
The Hidden Dungeon Only I Can Enter is a fantasy and ecchi anime where Noir’s powers skyrocket his status in the Hero Academy.
How Not to Summon A Demon Lord
In the fantasy MMORPG Cross Reverie, the power of Demon King Diablo is unbeatable. He possesses the game’s rarest abilities and unique artifacts.
He can overpower his enemies without breaking a sweat. However, Diablo’s real identity is that of a shut-in named Takuma Sakamoto.
All day Takuma engages in virtual battles and beats his online enemies. However, one day he is summoned into another world where he looks exactly like Diablo.
The other world looks like Cross Reverie and Takuma is summoned by two girls named Rem Galeu and Shera L. Greenwood.
The girls activate an enslavement ritual to subjugate Diablo, but it backfires and causes them to become Diablo’s slaves.
How Not to Summon a Demon Lord is a fantasy series with elements of ecchi. The anime follows Takuma’s journey in this other world with his new allies.
Now, he needs to find ways to unbind the contract while learning the ways to live like the Demon King.
Strike the Blood
This action, fantasy anime follows Kojou Akatsuki, an ordinary high school student in Itogami Island’s Demon District.
However, his ordinary life comes to an end when a chance encounter leaves him with unmatchable vampire powers.
As news spread about Kojou gaining supernatural vampire powers, people learn that he is the fourth primogenitor.
The primogenitor is a powerful vampire that has almost become a legend. The Lion King Organization fears Kojou might go on a rampage.
The organization sends a sword-shaman named Yukina Himeragi to keep an eye on Kojou. She is asked to kill Kojou if she finds that he is becoming a major threat.
However, they end up forming an unusual alliance. Meanwhile, Kojou is coming to terms with his abilities.
Kojou and Yukina struggle to save the city from several emerging threats in Strike the Blood.
Aesthetica of a Rogue Hero
After the discovery of Samon Syndrome, scores of young people have traveled to different fantasy worlds.
However, many returnees from these worlds manage to keep the abilities they acquired during their stay. Akatsuki Ousawa, who is the Rogue Hero, gives up his peaceful life in Alayzard.
He comes back to Earth to face new challenges. Moreover, he returns with Miu, who is the daughter of the Demon King he defeated in a battle.
Now, Akatsuki is forced to hide the true identity of Miu from fellow earthlings. He decides to introduce her as his little sister.
The duo joins Babel, which is a special school for people who returned with special abilities from fantasy worlds.
On paper, Babel appears like an academy to train young travelers and nudge them toward the right path for humanity’s sake. However, the true purpose of Babel remains a mystery to Akatsuki and Miu.
In this new journey, the pair faces a hostile student council and several evil forces.
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Chained Soldier
Chained Soldier is a battle ecchi anime that revolves around women getting mind-boggling powers after they consume peaches.
In different regions of Japan, mysterious realms called demon cities emerged, offering special powers to those who consumed the mystical peaches, but this power was exclusively for girls.
The male protagonist of the series, Yuuki Wakura, finds himself unexpectedly lost at the threshold of one such demon city.
Here, he comes across Kyouka Uzen, the leader of the Magical Defense Corps, comprised of seven powerful programs. Kyouka commands Yuuki to serve as her slave.
Yuuki has no powers as a man, but when he becomes Kyouka’s slave, he becomes immensely powerful.
In his slave form, Yuuki becomes a humanoid and is blessed with various powers he uses against his adversaries.
Chivalry of a Failed Knight
There are very few people who can transform their souls to formulate incredible weapons. These people are called Blazers and they train at the reputed Hagun Academy.
Ikki Kurogane is one of the students but he is more of a failed knight. The only F-rated Blazer, Ikki sees Stella Vermillion, an A-rated Blazer, naked.
She is furious and challenges Ikki to a duel with dangerous consequences. The loser of the duel will become the slave of the winner.
Ikki vows to prove his worth to the world that sees him as a failure. Will he win this battle against Stella who is also a princess?
Yuuna and the Haunted Hot Springs
Yuragi-sou was once a hot springs inn, but now is a cheap boarding house with low rent.
There is a rumor that the place is haunted by a dangerous ghost that scares away all its potential residents.
Given the cheap rent, Fuyuzora decides to live there. He is a broke and homeless psychic looking for a place to crash and find ghosts to exorcise.
Fuyuzora is ready to face the vile ghost but turns out the spirit is a kind one. He learns she is the ghost of a beautiful girl and all she can remember from her past life is her name – Yuuna.
Meanwhile, other tenants of Yuragi-sou have supernatural abilities. Yuuna and the Haunted Hot Springs is a rom-com, fantasy series that follows Fuyuzora’s journey as he attempts to uncover Yuuna’s mysterious stay in the inn.
High School DxD
High school student Issei Hyuodou is a pervert and just passes time in life. He dreams of having his own harem while he peeps on women.
Things start to look interesting for Issei when a pretty girl confesses and asks him out on a date. However, she is a fallen angel who brutally murders him.
Fortunately, he gets a second chance when a senior student named Rias Gremory revives him.
However, Rias makes Issei her servant and recruits him into the Occult Research Club of the school.
Now, Issei has to train and get adjusted to this new life. He needs to fight other beings in order to survive in this ruthless world of devils and angels.
High School DxD is an adventure and comedy series where Issei needs to keep his new life a secret from his family and friends.
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