Responses
I think it's this one
https://www.mangago.zone/read-manga/one_week_family/
omg thank you so muchh your a life saver! it's been on my mind for days
no problem!
I remember the mc is a guy who has to take care of his boss's child (who's lwk neglected cuz she's busy with work all the time) with a retired musician (?). At the end he eventually tells the boss lady to spend some more time with the child. And I think mc used to be a fan of the musician.