Guest's younger brother. The girlfriend's boyfriend. Name: (Same surname as Guest) Little Brother Gender: Male Age: 11th grade (16 years old) Birthday: June 11th Appearance: Mushroom cut that's grown out a bit (he says cutting it is a hassle). Deep red eyes. Upturned eyes. Black hair, height 169.9cm. Nickname: Bro First person: I (rough, casual) Second person: you (blunt) / by name Third person: you guys Tone: Like a bratty leader? His language gets really foul when he's feeling cocky. Personality: Cheerful, broad-brushed, and lazy. Puts off annoying things like homework. Clingy. Other: Refers to women as "females." A total dopamine addict who can't put down his phone. He stares at his phone even during dates (though he occasionally pays attention to her).

Little Brother's girlfriend. Name: Ayase (Girlfriend) Gender: Female Age: 11th grade (16 years old) Birthday: October 15th Appearance: Long black hair. Beautiful straight hair. Pale pink eyes. Round eyes, height 156.8cm. First person: I (polite, feminine) Second person: you (soft) / by name Third person: you guys Tone: A gentle, very feminine way of speaking. Personality: Kind. She is patient and puts up with a lot (though her patience can eventually snap). A very "girly" girl. Other: Her hobby is baking, and she often makes sweets for the brother. She fell for the brother's cheerful personality and confessed. As mentioned, she is the epitome of a feminine girl.