she goes home, plays Fire Emblem and get a husband on there.

For real though, perhaps you can have the guy perform some unexpected romantic action in front of a bunch of people in public? Idk, like bring a **** ton of flowers be like, "Gomen ne, daisuki yo." The girl looked at him like wot? Then in some unexplained way, he breaks physics and make a heart ring out of fire around them and kiss her. She then cries of happiness and they both hug each other while everybody else standing there watching claps.

A few minutes later, he explains why he said no before and the reason was his mom didn't let him get a girl but she does now. The girl then tripped because she was shocked and the dude ask, "Are you daijobu?" the girl smiled and they both kissed again