My childhood friend [Uta] is a caring girl who always takes care of me. When she found out that I was a [virgin], she was worried and decided to be her first partner ...! After that, every time I saw him in the library, club room, classroom, etc., he started asking for me, and I fell in love with him. However, as if to betray me, I started having sex with my senior handsome boyfriend in front of me.