Forgotten First Meeting: She knew Terumi five years ago during his middle school years, as a teacher. Also, it's still a great mystery how Tsukasa's gang was able to torment Terumi in the same classroom on multiple occasions, not just one.

During the final volume of the story, Terumi at long last crosses the line and sleeps with his aunt. Operation: Jealousy: She may or may not be trying to invoke this by letting Murakami stay over the house with Terumi watching. It turns out that this is the same in reverse; older women that Terumi interacts with are interested in him. She is later "dethroned" when the final tankobon shows Terumi sleeping with Kaoruko for three months straight. Knowing that Terumi would have to move on from her, she tried to draft up a marriage registration form, in an effort to keep Terumi for herself.Increasing Terumi's prowess in sex is Kaoruko herself, who is willing to use her body and knowledge of a woman's mind to make Terumi more privy to sexual acts, though she and Terumi never commit incestuous intercourse and stop before it goes too far. As a result of this, Ruri develops gratitude and affection towards Terumi, though she never discovers Terumi's true gender.

Asahi Momozono ( 桃園 朝日, Momozono Asahi, 21-year-old) The first target and Terumi's cousin, she was close with him when they were kids, but drifted apart as the years went by. This all changes when she spends quality time with Terumi, ultimately "cheating" on her boyfriend by sleeping with Terumi for the night. Forceful Kiss: Rokujou does this to Yuu after confirming that she has genuinely fallen in love with Terumi. Stalker Shrine: The walls and even ceiling in her apartment are covered with photos (or rather posters, given their size) of Terumi in different moments of his life. When they become a couple, Terumi makes sure to take it nice and easy with Yuu, out of consideration for her feelings.When She Smiles: Kaoruko is known for smiling smugly but there are times when she's genuinely happy for Terumi and those type of smiles do come out for him at the right moments.