Most Isekai anime out there are popular because of the underlying harem plot with ecchi scenes. However, this genre of anime has plenty of hidden gems with deep storytelling, which takes a rather retro route.
Our list below will therefore go over some of the best Isekai anime that you can watch today, which champion both narrative and the harem sub-genre.
Top Harem Ecchi Isekai Anime
I’m the Evil Lord of an Intergalactic Empire!
When talking about some of the best harem isekai anime, we cannot miss out on I’m the Evil Lord of an Intergalactic Empire! It is adapted from a light novel series written by Yomu Mishima and illustrated by Nadare Takamine.
The plot of the show follows an individual who has had a terrible life. Even though he tried living a pious and good-natured life. He is given a chance at a new incarnated life in a different world by a mysterious Guide. He is allowed to have a new life where he can live selfishly.
But the Guide’s plans are foiled. It turns out that the protagonist’s idea of villainy turns out to be one of prosperity. If you are looking for a good harem isekai with some ecchi scenes, then this show is right up your alley.
The Eminence in Shadow
The Eminence in Shadow is one of the recent harem isekai shows that garnered a good deal of fan following. The source material for the anime is a light novel written by Daisuke Aizawa and illustrated by Tozai.
It was then adapted into a manga series by Anri Sakano and even got a spin-off manga. But it didn’t yet reach its global popularity status until the anime was released in 2022.
Plot of The Eminence in Shadow tells us the story of an individual named Cid Kagenou. After the events of his death, he is reincarnated into another fantasy world. He creates his own cult to fight against another cult that worships a demon.
Cid’s cult is filled with loyal female members who want to be romantically involved with him. But unfortunately, our main guy stays unaware of his own harem.
Harem in the Labyrinth of Another World
Originating from the light novel series written by Shachi Sogano and illustrated by Shikidouji. Harem in the Labyrinth of Another World, just like the previous show on this list. It got a manga adaptation and then an anime, moving forward.
The title of the show is pretty self-explanatory for what one can expect if they are looking for a harem isekai, with some raunchy ecchi content. The premise of the show is pretty interesting.
It follows an individual who gets transported to an alternate world. It happens after creating his new game character on a shady website. He then proceeds to live out his fantasy in this world by saving female slaves and building his own harem.
Re: Monster
Just like most of the anime on this list, Re: Monster is an isekai show that originates from a light novel. It was written by Kogitsune Kanekiru and illustrated by Yamaada. The series got a sequel, which started publishing in 2018.
Re: Monster’s plot, unlike most Isekai shows, does not follow a human getting transported to another world as a human. Rather, the main protagonist of the show finds out that he has turned into a goblin as soon as he enters the new world.
Our protagonist then moves forward to form his own harem with his newfound powers. Most of his female partners are from various races and are referred to as his mistresses.
Trapped in a Dating Sim
The full title for this show is Trapped in a Dating Sim: The World of Otome Games Is Tough for Mobs. Quite the mouthful name, which is pretty normal for a lot of isekai anime that are adapted from light novels.
The idea for long titles is literally to summarize the kind of plot the viewer is getting into, instead of having to read a multi-line description. So, as you might have guessed already, the show is about our protagonist getting trapped in a dating sim.
But as enticing as that premise sounds for all the harem and ecchi fans, the dating sim world where the protagonist gets transported to is a harsh world where he is forced to cheat in order to win.
If one is looking for a funny isekai show where the protagonist is trying to build a harem, then Trapped in a Dating Sim is a good recommendation.
Arifureta
Arifureta: From Commonplace to World’s Strongest is a very self-explanatory title for an ecchi isekai show. It was written by Ryo Shirakome and illustrated by Takayaki originally as a web novel, which later got published physically.
The story this time is a bit interesting, unlike most isekais. Multiple characters, along with the protagonist, get transported to another world. Unfortunately, our main character is subjected to bullying from his peers. This is due to him having the weakest abilities in this new fantasy world.
The anime follows his rise from being the weakest person around to a powerful character. He forms a bond with several strong female characters, forming a harem
Tales of Wedding Rings
Tales of Wedding Rings is an isekai anime that does not originate from a web novel or light novel. But this time, it originally comes from a manga. It was both written and illustrated by an artist whose pen name is Maybe.
As you might have guessed already from the title, this is a harem anime about multiple wedding rings. The anime was produced by Staple Entertainment Studio and has been airing since 2024.
The plot is a funny one that follows our main character traveling to another world. But he doesn’t become some hero with abilities; he crashes a wedding, becoming the husband to the bride instead.
Circumstances now lead him to pursue more brides and get married to collect elemental rings. This journey of building his harem is the only way to save the world from the Abyss King.
