Based on the erotic game by Pita Fetish!. 
 
To overcome his attraction for his younger sister Hana, Yuuichi Mitsui made sure to enroll at a university far away from his home. Unfortunately, being separated from her only strengthened his feelings. He continues to feel guilty for harboring illicit thoughts when suddenly, Hana shows up at his doorstep on a summer morning, looking more beautiful than ever. 
 
However, despite her physical maturity, her intellect is that of a child. Consequently, Yuuichi tries to hold back from laying a hand on his innocent sister. But it is easier said than done, especially when Hana's ignorance—combined with her innocence—makes her a woman that Yuuichi can't help but desire. 
 
(Source: MAL Rewrite)

Born on March 3.
Shizuoka Prefecture, Japan.

She is a voice actress currently affiliated with Yellow Tail. She is more known for her eroge roles under the name "Kasumi Yomogi".

[Profile](http://y-tail.jp/profile/matsunaga.html) | [Twitter](https://twitter.com/yomogi_kasumi) | [Wiki (jp)](https://ja.wikipedia.org/wiki/%E8%93%AC%E3%81%8B%E3%81%99%E3%81%BF)

Based on the erotic game by Pita Fetish!. 
 
The Mitsui family desperately wanted a girl, so when Mitsui Hana was born, her parents spoiled her very much. So when Mitsui Hana big became a very stupid person. Things to remember will forget when walking 3 steps, and he can not read the atmosphere, and also he does not understand a button that is more than 3 buttons. Mitsui Yuichi was assigned to take care of Hana's younger sister as long as her parents went abroad. And Yuichi must be able to face this cute and stupid sister. 
 
(Source: Nekopoi and Has Been Translated)

Hana Mitsui