Responses
This sounds like Cutie Boy ( http://www.mangago.zone/read-manga/cutie_boy/) except they get engaged and the girl is the one who transfers out of the school.
This is the scene: http://www.mangago.zone/read-manga/cutie_boy/mr/cutie-boy/8/29/
does anyone know a manga about a girl who to get bully when she was little by a boy who make her married her before the day he have to go