Shinyuu tte Soko made Shinakucha Ikenai no?  

Does A Best Friend Have To Go That Far?, 親友ってそこまでしなくちゃいけないの？

Takahashi and Tanaka have been friends since childhood. When Issei discovers he has a condition that will cause his genitals to shrink, he asks Kento for assistance in slowing down the progression of the disease by massaging his prostate. Initially hesitant, Kento ultimately agrees to help his friend due to the severity of the situation.