Responses
Not sure about the bathroom part but possibly this?
https://www.mangago.zone/read-manga/interview_with_a_murderer/
IT IS THISSSS THANK YOUUUUUUU !!!!!!!!! ε=ε=(ノ≧∇≦)ノ
im looking for this manhwa i read a really long time ago, i dont remember a lot but it was a bl abt one guy who like killed people and this other guy who i think was either a police officer or an investigator or something? the killer guy had dirty blond hair and the other guy had black hair. i remember one of the victims was found in a bathtub made to look like a mermaid i think idk