Well, it’s actually Baka na Imouto wo Rikou ni Suru no wa Ore no xx dake na Ken ni Tsuitesu. But it’s such a long ass fucking name, my SEO software got pissed at me. Hence the shortening in the title. But that long ass fucking name actually translates to The Case Of Making My Stupid Little Sister Smart With Only My XX. A four episode OVA released in 2016. Each episode is 16 minutes long. It takes it’s source from a visual novel called “Baka na Imouto wo Rikou ni Suru no wa Ore no xx dake na Ken ni Tsuite”. It’s one volume and seven chapters. It was published in 2015.
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.
So, It’s about a horny teenage guy tricking his retarded sister into fucking him by telling her that she will get smarter by drinking his cum.
The brother is a dick.