A painfully splendid adventure has begun!

Dr. Cat Kagami was hoping to leave her torrid past behind, but a failed assassination attempt has now put her square in the crosshairs of a team of brutal killers. Now no one is safe, including her lesbian co-worker and a mysterious woman with a terrible secret that could bring down an entire Japanese company. Cat must take the law into her own hands and enact her own special kind of revenge!

In one of the districts of Tokyo, an old school is planned to be torn down after the summer holidays. The only person who is seriously worried about this is the Japanese language teacher Nakajima. He decides to hold special additional classes for the lagging students during the summer holidays, which they will keep as a memento of the old school.