Ark Academy, chosen as a model case for schools that integrate different races. Aegis, a knight guarding Iris, transferred in with the elf princess. Aegis supports Iris's "assistance" from the homeroom teacher. "No problem. Just let it out when you want to." Aegis even handles the homeroom teacher's semen when Iris is unable to. She performs her duties dispassionately, shaking her well-developed breasts and firm buttocks as she serves his penis. The homeroom teacher is troubled by the guilt of having relationships with multiple students and ejaculating inside them. However, a shadow can be seen somewhere on Aegis's dignified expression... Mating with the elf princess Iris. Iris collapses after being repeatedly filled with semen. Without a moment's rest, the knight guard Aegis takes over!?