Hitomi Kashiwa

After asking Satou to join the literature club, Satou did so. However, since they were both shy, they were only seen debating conspiracies and playing cards. In the manga and Light Novel, it is made blatantly obvious that she and Satou had sexual relations, with her taking his virginity in high school and giving him goodbye sex when she graduated ahead of him and left him alone. However, in the anime, it is a relatively debated subject as to whether she had sexual relations with him, as they had only hinted at the fact that they might have during flashback scenes.