A married couple visited the hospital for a checkup. The big-dicked erotic doctor Sato, who works there, pressed his stethoscope softly against the breasts of the embarrassed married woman as she shyly lifted her shirt, while plotting a lewd scheme. The wife told her husband, "I have to stay overnight for a checkup and hospitalization." Unfortunately, only a bed in a large ward was available, so she reluctantly closed the curtain and changed into hospital clothes, but the patients in the ward stared at her. Late at night, when everyone was asleep, a suspicious figure approached the wife's bed...