Seiichi Aramiya (Aramiya Seiichi)
The normal high school eroge playing protagonist of the series. He prefers 2D girls over 3D girls due to an incident when he was in elementary school.
Kotoko Ayame/Kotoko Tanaka (Ayame Kotoko/Tanaka Kotoko)
The main female protagonist of the series. She fell in love with Seiichi when he scared off the thugs who tried to rape her.
- Delinquent Hair: Had her hair dyed light brown but dyed it back black to be more of Seiichi's type of girl.
- Girlish Pigtails: Changes her hairstyle to twintails to be more the type of girl Seiichi would like.
- In-Series Nickname: She has two.
- "Chuuko" (used goods) from combining the "naka" kanji of her original surname and the "ko" kanji from her given name. It was given to her in primary school due to Keita Kozaki messing around. She got stuck with it all the way to high school.
- "Cotton" is an Affectionate Nickname and a play on her given name.
- Japanese Delinquent:
- Long Hair Is Feminine: Has very long hair.
Keita Kozaki (Kozaki Keita)
Seiichi's friend and fellow eroge enthusiast.
- Unwitting Instigator of Doom: "Doom" is a bit strong but he is the one who made the "Chuuko" nickname for Kotoko which is the origin of the rumors that she was "used goods"note .
Yuuka Hatsushiba (Hatsushiba Yuuka)
A high school seiyuu who was friends with Kotoko since primary school.
- Matchmaker Crush: Despite wanting her best friend and Seiichi to be together, Yuuka is slowly falling in love with him.
- My God, What Have I Done?: After realizing Songou uses her to attack Seiichi and Ayame.
Kiyomi Aramiya (Aramiya Kiyomi)
Seiichi's younger sister.
Kiriko Kotani (Kotani Kiriko)
Seiichi's older cousin and a teacher at the school.
- Anger Born of Worry: She is seriously worried for her cousin whenever he went missing.
- Hot Teacher: Her cousin lampshades this and asks her not to tell everyone in school about their relations, particularly the boys.