It's about a guy who goes to the doctor to get his erectile dysfunction treated and his penis lengthened. Then the doctor turns out to be the same guy who caused his e.d. when they were kids, and then, after a lot of lying and molestation, they find out they love each other, happy end, etc.
i had just barely looked at it and now i can't find it anywhere! 😕
please help~

Bi no Isu - Chap 4.