Yakin Byoutou San / Night Shift Nurses - Experiment

The main character of this anime is Sora, a young man who finds himself on the brink of life and death after a serious injury. His life is saved by Yagami Yu, a charming nurse. She takes him to the hospital, where he is successfully treated to a stable condition, covering all the costs of compulsory medical insurance.

After that, Sora is approached by the chief doctor - Mikagu Reiku - and offers him to participate in the trials of a new drug that increases sexual activity. This offer is a kind of compensation for the free treatment. Sora agrees, feeling grateful to the hospital.

Finding herself surrounded by seductive girls, Sora begins to feel more confident.