If you liked
InuYasha
|
...then you might like
Bastard!! Ankoku no Hakaishin (ONA)
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The two main characters have a very similar relationship dynamic (kind girl with control over a powerful demon after breaking the seal on him). Both shows are also action adventure in a fantasy setting with bits of comedy and serious/emotional moments. I'd say anyone drawn to these aspects and likes one should give the other a shot, though "Bastard!!" is certainly less appropriate than InuYasha due to nudity and darker themes.
If you liked
Rosario to Vampire
|
...then you might like
Mairimashita! Iruma-kun
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*Human teenage boy ends up attending a school meant for demons/monsters *Light-hearted comedy with some serious moments & songs sung by the VAs The Rosario + Vampire anime focuses more on fanservice and romance where as Iruma-kun focuses more on story progression.
If you liked
Ling Qi
|
...then you might like
Banana Fish
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The pair of male leads share a very unique "selfless love" kind of relationship. Both shows are filled with action and the main character's lives are often on the line.
If you liked
Dorei-ku The Animation
|
...then you might like
Pet
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Both have psychological horror elements with the plot focusing on people controlling the minds of others. Most of the time it is not good people doing the controlling, so it can be intense and difficult to watch. Pet delves deeper into psychological aspects and is harder to understand while Dorei-ku is more of a crude dramatic thriller with characters being forced to obey others.
If you liked
Suisei no Gargantia
|
...then you might like
A.I.C.O. Incarnation
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These are original action/sci-fi anime that involve fighting otherworldly organisms which threaten humanity. They also share the same director, character designer, and composer, so the viewing experience is very similar.
If you liked
Sengoku Basara
|
...then you might like
Koutetsujou no Kabaneri
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Both have: - a colorful historical Japan setting with samurai - rule of cool elements in action sequences - epic music by Hiroyuki Sawano - a funny guy who sometimes speaks English (if watching subbed) - a lot of style and expressive characters These are both a fun watch if you don't care very much about everything making sense, especially if it's easy for you to get engaged in a well-animated show filled with emotion.