At a co-ed school, a mixed-gender anal health examination is underway. Today, Akari can't put her clothes back on until her exam is finished, leaving her visibly distressed. Shinomiya from the tea ceremony club comes to the infirmary feeling unwell. Once Shinomiya finishes, the entire examination will be dismissed. As Aoi cheerfully encourages, "Akari, you can do it!", a sense of youthful tension fills the air. Akari performs squats in her underwear, her light purple lingerie especially sexy, and thrusting her hips back further makes her even more alluring. Yet she struggles, unable to bear seeing her own anus displayed on the monitor—"No, it's too embarrassing..."—her hairy erogenous zone standing out provocatively. The boys complain, "Hey, how long are we supposed to keep watching?!" Some even voice discomfort: "I don't want to do the pinworm test..." escalating the tension. Suddenly, Akari gasps, "Ah, my butt... what is this? Something's inside..." on the verge of giving up, when Aoi shouts, "You'll be fine, I promise!" The boys also get an up-close view of senior Shinomiya enduring her exam. As she grows accustomed to the anal stimulation, touching her nipples brings her pleasure. Finally, she cries out, "Ah~ I'm cumming~" The doctor thoroughly probes deep inside with a special instrument, changing angles for re-examination and administering a special injection. Try not to spill too much. The re-test confirms no abnormalities. Relieved, the examination finally ends.