Akitoshi grows suspicious of the unfamiliar girl who has suddenly appeared at school and decides to follow her after hours in hopes of uncovering the truth. His search leads him to the storage yard, where Mikage stands encircled by the otherworldly Yuragi. Before he can intervene, the skilled fighter Ai appears and swiftly dispatches the creatures. Watching the scene unfold, Akitoshi is left questioning whether this mysterious newcomer is an ally or an enemy.