On her way to school, a pervert taught her what orgasm is. (The story is from the anime/manga series "The Melancholy of Haruhi Suzumiya" - TEAM-092)

A pervert, a master of groping, sets his sights on the pretty girls who commute by train every day. Student Ryoko, however, never imagined that a pervert would be targeting her on the train… Amidst the crowded conditions, the pervert becomes increasingly brazen, reaching into her underwear and groping her vulva. Later, he directly pulls open her underwear and inserts his penis. This goes beyond mere groping; it's a brutal gang rape, with the pervert's penis being ejaculated inside her. Once the pervert starts berserking, no one on the train can stop him…