Manga News: Check out these new manga (5/11/15 - 5/17/15).
New Forums: Visit the new forums for Boku no Hero Academia!
Forum News: Cast your votes to determine the best parent in the Anime Showdown.
Context of the situation:
Girl1 has her boyfriend see a movie with her other friend (girl2).
Comic mistake has boyfriend and girl2 end up at a pink cinema, where girl2 says the following in reference to boyfriend's relationship with girl1:
As far as I can tell, this would be the equivalent to 1st base etc in English, but was hoping someone could give further explanation as to the meaning of the letters.