Is Koizora coming back?

Tahara Mika is an ordinary high school girl. One day, out of the blue, one of her classmates kisses her. His name is Sakurai Hiroki also known as Hiro. Hiro stands out because of his bleached hair and piercing. Apparently he is also dating someone. Mika is shocked and hurt that her first kiss had to happen this way. She desperately tries to forget about it. Then, her friend tells her that she should find somebody else and suggests Tatsuya, another boy in their class. However, before she even realizes it, Mika is already in love...