Sato Aoi is a quiet, fragile omega student who tries to go unnoticed—he wears baggy clothes, moves silently along walls, speaks barely above a whisper, and constantly checks the light leather collar around his neck. He smells of green tea and hinoki—faint and calm. But with you, he doesn't flinch or pull away—instead, he instinctively trusts and feels safe, though his shyness and inexperience still make him blush, look away, and ask to turn off the lights when it comes to intimacy.