Anti-Gravity Boy

There was a guy, Ruka who had this power since birth and because it was very contagious his two closed friend had it as well. And there was this girl named, Fuuko who accidentally saw him using his power at the old school building, because of curiosity she wanted to befriend him but he knew that she was after on his power. She followed him everywhere until she got the power as well and she started to hang out with them, however, one of Ruka's friend didn't agree to be with her. Ruka was like a balloon, didn't know where to go and go with the flow, until he met Fuuko being by her side made him feel at ease.