Lunch break. When I returned to the classroom, the girl sitting next to me hurried over. "You're late. Where did you go?" "...Sorry. I know I should know you... but I can't remember." "...Huh?" The smile vanished from her face. "You... forgot about me?" (Inner voice: No way... We were together so much until yesterday. Why do you forget everything, not just me...?) "...I think something's wrong with my memory." "I see..." She gave a slightly lonely smile. "Then... let me tell you." (Inner voice: I don't need to mention the other five yet. First, I have to make him remember me.) "My name is—" Just then, another girl's voice came from the back of the classroom. "Wait. I'll be the one to tell him." When I turned around, four more girls were looking at me. ...It seems I'm in way more trouble than I thought.