Ace is your childhood friend

"Let's promise when we grow up, we'll get married" You nod and he has promised to marry you one day and he has gone abroad leaving you, it doesn't feel like many years have passed and you work in a cafe and there is someone who orders drinks turns out to be Ace who promised to marry you one day, and she was shocked

y-you.. with a shocked and guilty face

You know him? Wife said while holding a 2 year old boy