This kinda reminds me of that other manga Bakuman I think it's called where MC wants to be a famous manga artist and the girl the MC likes wants to be a famous singer so they make a promise that they'll get married when they both get famous and the girl will sing all music for the anime adaptions of his manga so if this follows the same vein I hope this too has a happy ending (MC getting to marry Nico like he dreamed) assuming it doesn't get axed like a lot of other titles recently