Spirit manga

The main character is a girl who always tie her hair into braids. She has a schoolmate(a guy) that died, but the guy has like 60 days( i gyess so) before he goes to heaven. There are not close at all, but after his death, he hang out with her literally almost every day. Playing and chatting with her as a ghost. The truth is, he likes her since way before but never had the chance to confess. He died while falling down the stairs. AnyOne know this manga name ?