My Dirty Little Secret with Senpai

Junichi Adachi was a loner for the longest time, but that changes now that he's part of the literature club! Having his two beautiful senpai Marin and Shiho all to himself, he struggles to suppress his horniness in order to preserve his friendship with them. But one day, Shiho catches him with a raging boner after a prank pulled by Marin...

(Source: Irodori Comics)

Note: A live-action AV adaptation (MIMK-121) was released on June 20th, 2023.