Strip Mahjong: Midnight Clinical Test [脱衣麻雀病棟X]

Mizuki, a female doctor working at a certain hospital, is immersed in the treatment of Aimi, a high school girl infected with SDX (Viral and Sexually Sensitive Disease). During the treatment, Mizuki realizes that SDX is artificially made. However, at that moment, Dr. Nakamatsu appears and begins a desperate game of survival.