Saikano

Shuji and Chise have recently begun dating, but Shuji is a bit doubtful about his decision. However, they manage to patch things up and give their newfound love another chance. When Shuji goes to the Sapporo mall with his friends, a group of unnamed bombers attack the city. Injured, Shuji tries to get up only to discover Chise's darkest secret...