HMN-866 Tojo-san, a classmate who secretly lets me have sex with her and ejaculate inside her while we're commuting by train.

Every morning, I commute to school on a packed train that takes an hour each way. Every morning, surrounded by middle-aged men and filled with their stench, was unbearable. However, one day, everything changed drastically—I was swept along by the crowd and pressed against Tojo-san, a classmate I'd barely spoken to. The train's swaying caused me to accidentally touch her incredibly soft buttocks, which made my penis instantly erect, and she noticed. I braced myself for social ruin, but what Tojo-san said was... "You can come inside me"...!?!? What?? From then on, I began to be allowed to come inside her almost every day, both on the crowded train and after getting off—