Immoral Routine The Animation Episode 1

Shouta accidentally caught his classmate Nao masturbating in the classroom and, without thinking, suggested, "Don't you want to do it together?" Since then, they became a pair that mutually masturbated at school during the early morning hours. Seeking to break the monotony and the routine that had become mechanical, they decided it was time to move to real sex… (Source: TMDB)