Hajime no Yuujin

When he was in elementary school, Ryota Tanikame had a terrible experience by participating in the "Futa Matsuri" handed down to a rural village he visited on a trip. One day, Ryota, who has become a college student, meets a mysterious young man, Saku Nakamoto, in the classroom one day. Since then, strange events have started to happen around Ryota? A strange story about male college students. https://comic-days.com/episode/2550912965708438429