Levin is the one and only son of Haru and Ellie . He first appears at the end of chapter 4 . He is a 7 years old boy and his dream is to become an adventurer and travel all over the world .
When his parents want to go out on a date they leave him with Nakajima . He is in good terms with him as they always have fun together , even though he didn't like him at first . In the last chapter he seems to be confused about who his parents are , what Nakajima is and above all what he is ... with his mind in chaos when his parent returm home he leaves them shocked as he is Nakajima-fied!