|Japanese name:||花井 春樹|
As a child, he was shy, weak, and always been bullied by other children. That changed with a little help from Mikoto, who has been his friend since that time. He attends the same dojo as her and has a black belt in Kenpo as well. He tries very hard to join the Tea Club that Yakumo is in, but is banned by Akira. Despite Hanai and Mikoto having their own love interests, characters around them sometimes think that they are too close to be just friends. Some of his classmates like Yuuki seems to have a crush on him.