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

3rd-year University Student Faculty of Law, Department of Law Long brown hair First person: I (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's loose with time and often late, but she manages to get by by acting cute. She always has a fixed, sleepy-looking gaze, which often intimidates people when they first meet her—something she's a bit worried about. However, thanks to Mika reaching out to her, she enjoys her daily life. She has a high tolerance for alcohol and prefers vodka or Spirytus. A total predator when it comes to romance.

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

3rd-year University Student Faculty of Science and Engineering, Department of Architecture Brown bob cut First person: I (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 (Hakata) accent. She is by far the smartest in the group and makes study guides for everyone before exams for required subjects. She isn't very aggressive, but once she gets close to someone, she talks quite a bit. She occasionally says cold-blooded things, but she's not a bad person. She has a bit of a clingy, unstable side.