Hentai Manga like Oneppyu

Boku no Tonari no Onee-chan

Also known as The Older Girl Next Door.

Status: Finished
Genres: Hentai

The older girl next door helping Naoto to stand up for himself at school through special training.

Atarashii Onee-san

Also known as My New Big Sister.

Status: Finished
Genres: Hentai

When Yuu’s distant (and attractive!) relative Amane moves in with his family, things between the two of them couldn’t be more awkward. But Yuu is determined to make her feel welcome. Just as their relationship seems to be improving, Yuu’s best friend expresses an interest in Amane. There’s no way Amane would be into him though… right?

Ane x Gimi

Status: Finished
Genres: Hentai

Overflow

Also known as My Brother's Slipped Inside Me in The Bathtub.

Status: Releasing
Genres: Drama , Hentai , Romance

"Can't... keep my... voice down." Nii-chan thrusting in me again and again. We shouldn't be doing this as siblings... so, why does it feel this good...?



Volume 1: Overflow: Iretara Afureru Shimai no Kimochi (おーばーふろぉ〜挿れたら溢れる姉妹のキモチ〜)
Volume 2: Overflow: Toaru Kyoudai no Kindan Seikou (おーばーふろぉ〜とある兄妹の禁断性交〜)
Volume 3: Overflow: Atsuku Majiwaru Shimai no Taboo (おーばーふろぉ〜熱く交わる姉妹のタブー〜)
Volume 4: Overflow: Nagisa ni Matsuwaru Shimai no Fushidara (おーばーふろぉ～渚にまつわる姉妹のふしだら～)
Volume 5: Overflow: Uzuku Shimai to Higawari Seikou (おーばーふろぉ ～疼く姉妹と日替わり性交～)
Volume 6: Overflow: Nozoku Shimai no Seiai Jijou (おーばーふろぉ～覗く姉妹の性愛事情～)


Notes:
Originally serialized as a web manga under the title Jitsu wa Ima Haittemasu....: Ofuro de Onii-chan no Katai Are ga... (実は今入ってます…。お風呂でお兄ちゃんの硬いアレが…っ).
Simultaneously released in long-strip format for mobile reading with each chapter split into 3 ‘episodes’.