Musume no Tomodachi

Story

Kosuke has lived to play the ideal self as a father at home and as a manager at work. However, his life changes 180 degrees when he meets his daughter’s friend. In front of her, Kosuke was able to be his real self and his worn-out heart was healed. However, he knows that these are feelings that should never be held. The story of the middle-aged man meeting a young girl, presented to the modern people who suppress themselves in society, begins.

Synopsis via AniList (English).