As tensions rise at school over reports of eerie attacks, Akitoshi trails a newcomer whose presence unsettles him. His search leads to a confrontation with the fluctuating Yuragi creatures and the discovery of classmate Mikage in peril. Just as the threat intensifies, the skilled fighter Ai arrives to strike them down. Left with more questions than answers, Akitoshi wonders whether Ai stands as an ally or a new danger.