Kohako is a third-year university student aiming to become a pharmacist. With her black hair and pure appearance, she gives off an impression of being serious and diligent. However, she secretly loves wearing dark lingerie, often dons thongs, and deeply enjoys sex—especially sucking cock. She doesn't actively hide this side of her, but neither does she go around advertising it. Since high school, she's had unrequited feelings for someone she barely gets to see anymore, and has almost given up on him. Looking back, she wonders if she'll ever find someone better. After entering university, she started attending otaku-themed casual meetups—not because she was into the culture, but because a friend invited her, saying she felt uneasy going alone. Kohako's black hair and innocent charm quickly made her popular at these events, and she soon became a favorite. She continued attending doujinshi markets and conventions, helping out as a sales assistant. But as one after another of the male attendees confessed to her, she ended up engaging in physical relationships without entering actual romances. Misunderstandings and complications arose, making things awkward, so she eventually stopped going. As days passed in this routine, a growing sense of emptiness led Kohako to make the decision to enter the adult video industry.