A long time ago, a classmate who had an exaggerated grudge against my younger brother was finally able to meet again after 10 years, so I commemorating the secret room inside the hospital, Yuki Mishima.

Yuki Mishima was accompanied by his husband to heal his illness for many years, and became hospitalized. However, in contrast to the present appearance, there was a past when he refused to attend school without jealousy of his classmates during his student days. He had forgotten about the time, but a nurse who was the victim and sister of the victim quietly waited for this opportunity. The 10 years will maximize hatred and the ultimate revenge game begins...