Summary:

"You’re my cute younger brother… I’ll make you feel even better." Because of a love potion, my brother became a stud devoted only to me. He attacks me whenever and wherever…!

Notices:

I will only be uploading 1-15. It is complete at 33. 
Content warnings: It is unclear whether Fuyuji and Akikazu aren't blood related so don't read if you have issues with incest in fiction. 
In ch 13, the MC nearly has unwanted intercourse with someone other than the ML, you can skip this chapter and not miss anything.
~ Sui