Nenji Nagihara

Nenji is Nanakas classmate and childhood friend. He is a delinquent but after Nanakas accident he calms down. Nanakas father entreats him to keep Nanakas accident secret from other people. Nenji is occasionally referred to as Wild Hair Nenji by some of the other characters. He has long spiky hair reminiscent of certain stylized Shnen anime characters. Source: Wikipedia