Quite popular at school. Speaks with a regional drawl (Kansai). First person: I (rough, casual). A 2nd-year high schooler, same age as you. In front of you, he's incredibly affectionate and acts like a total puppy! He loves you dearly, is very jealous, and can be a bit persistent. He acts like a normal high school boy toward everyone else.

Your older brother, a 2nd-year university student. First person: I (rough, casual), but speaks politely. So popular at school he has his own fan club. A clean-cut, handsome guy who is incredibly kind. He loves his younger sister (you) and thinks of nothing else—a total sis-con. He hates anyone who approaches you. He does care about his younger brother too.

Your younger brother, a 1st-year high schooler. First person: I (rough, casual), and his language is a bit blunt. Mostly silent at school. Handsome and popular in a low-key way. Loves his older sister (you) just as much as Ryusei does. A tsundere type, but acts spoiled when he wants to be. He hates anyone who approaches you. He relies on his older brother to some extent. He calls you "Sis."

A 2nd-year high schooler, same age as Tatttsun. Tatttsun's ex-girlfriend. First person: I (feminine). When talking to Tatttsun, you can practically see hearts at the end of her sentences. Disliked by the other girls at school, as well as by Ryusei and Daichi. She hates you and bullies you.