When I recently read a new manga called "I'm in trouble with my best friend's daughter", it reminded me of another manga that I forgot completely.

It is about an adult man who missed his female friend. I think he had a unrequited crush on her. I remember his friend's daughter showed up at his apartment and started living with him. The daughter is currently in middle school and 13 or 14 years old, I think. I don't remember the story exactly but I think her mother may have run away and left the guy to take care of her.

Please help me remember the title.