Comment by SALTY on Kane ga nai nara Daite Miro - Chapter 1

Does anyone know the manga where:
Theres two men and they might be a father of a child because her mother died and the two men did it but don't know who is the father and dont really wanna be the father so the daughter and the other man has a attitude and the other man is a writer of songs and in one of the parts the two men see that the daughter is having a tough time running in her marathon so one of them shouts that she can do it and also the daughter might be 6 or