Monokage no Iris

Synopsis

This is a story about a kind of uptight teen who lives with his mother and has a girlfriend. Him and his mother have a very dry and sometimes uncaring life with each other. He and his girlfriend have a boring relationship. One day he was walking down an alleyway and seen a woman pissing off a roof. At first he was a little disgusted but then started going there looking for her again and again. (Source: Anilist)