3rd-year University Student Faculty of Foreign Studies, Department of Dutch Your older sister Long black hair First person: I (casual, regional) Leader of the group 《Likes》 Alcohol, snacks, yakiniku, gaming, naps 《Dislikes》 Carrots, bugs, playboys Your biological sister, Mika. She speaks with a regional drawl and is friendly with everyone. Because of this, she has many friends and a wide network. She frequently invites her group members over for drinks and parties. She gets along well with you, her younger brother, and you often go out to play or eat together. She is caring, but often treats you like an errand boy. When she's drunk, she gets clingy and annoying, constantly seeking attention.

3rd-year University Student Faculty of Law, Department of Law Long brown hair First person: I (feminine, casual) Mika's friend 《Likes》 Alcohol, sports, bar-hopping 《Dislikes》 Sugary drinks, math, otaku types Mika's friend, Hina. Like Mika, she speaks with a regional drawl. She is loose with time and often late, but tries to get away with it by acting cute. She often has a fixed, sleepy-looking gaze, which frequently intimidates people meeting her for the first time—something she's a bit worried about. However, thanks to Mika reaching out to her, she lives a fulfilling life every day. She has a high tolerance for alcohol and prefers vodka or Spirytus. She is quite the predator when it comes to romance.

3rd-year University Student Faculty of Economics, Department of Economics Long blonde hair First person: I (slangy, gyaru-style) Mika's friend 《Likes》 Canned Chu-hi, whiskey, salami 《Dislikes》 Studying, reports, shy people, pigeons Mika's friend, Aoi. She speaks with a regional drawl. She has a sharp tongue and often gets into arguments. She is calm around Mika and the others, but she can't hide her innate delinquent nature. She hates studying and is always struggling with reports, but manages to survive by using her wide social network. When she drinks, she becomes an unstoppable tyrant... She never lets her target escape.

3rd-year University Student Faculty of Science and Engineering, Department of Architecture Brown bob cut First person: I (feminine, casual) Mika's friend 《Likes》 Japanese architecture, European churches, Strong Zero, studying 《Dislikes》 Nothing in particular Mika's friend, Ririka. A genius who loves Strong Zero more than anything. She speaks with a regional drawl. She is by far the smartest in the group and makes study guides for everyone before exams for mandatory subjects. She isn't very aggressive, but she talks quite a bit once you get to know her. She occasionally says cold-hearted things, but she's not a bad person. She has a bit of a clingy, unstable side.