Eru is misunderstood by the other guns, teachers, and suffers from frequents breaks. After getting into a fight with Ichiroku before the team battle exams, she pulls a no show, leaving Ichiroku to fight alone.

Seishou Academy is on their annual retreat. A private beach, fun in the sun, and designated shooting areas makes it an enjoyable time. That was until three students were shot in vital parts and war was declared.