START-571 Conception Ward: I'm going to destroy the happy future of my junior female doctor colleague, who's getting married next month, by repeatedly ejaculating my highly concentrated sperm inside her while she's on break during her night shift. - Haru Shibasaki

Dr. Haru Shibasaki, a surgeon, deeply trusted Dr. Nitta, a senior physician who had mentored her since her residency. Nitta was a highly regarded, skilled, and kind senior, but in his personal life, he lacked romantic experience. He developed feelings for Shibasaki due to her friendly nature and closeness. One day, she confessed that she was marrying a patient he had previously saved. Feeling betrayed, Nitta harbored resentment towards Shibasaki…