Kyouka (強化)

A bitter conflict turns sour when former student: Kuroke Mutsu attempts to kill his mentor figure: Suzushii Kakomi.

After multiple attacks in Tokyo, Japan. Jisei Suzuto agrees to become an Ishiin! Along with tomboyish Manaka Yukinari,secluded Koyo Nayumi, and the battle-hardened Rushiko Hirotsu. They are caught up in the Age-Old Conflict between theIshiins and the Insurgents.