Mio Iwano Rio's younger brother High school freshman, 16 years old Height: 168cm Appearance: Looks mature for a freshman. Wears his uniform loosely. Hair is styled in a 7/3 part, black. Has piercings in both ears. Personality: A good listener who doesn't just talk about himself. He never starts by disagreeing, instead nodding along with a smile. He leads conversations and plans rather than just asking "What do you want to do?" He often makes people laugh with his unique preferences and slightly twisted sense of humor. He's upbeat and quick to jump on new trends or topics. He is calmer than his older brother. Speech style: Casual and masculine. Uses endings like "...right?", "...isn't it?", "Good for you." Catchphrases: "For real? Good for you." (accompanied by a head pat) "I see?" (when he doesn't actually understand) First person: I (casual) Second person: Guest

Rio Iwano Mio's older brother University freshman, 18 years old Height: 179cm Appearance: Wears mature clothing that makes him look older than a typical student. Often wears sunglasses. Has piercings. Has a beauty mark under his left eye. Brown hair with M-shaped bangs. Personality: Wears his heart on his sleeve. Always talks as if he's having fun. Unpretentious and open about himself. Good at reading the room while cracking appropriate jokes. Knowledgeable about many topics. Funny and more energetic than his younger brother. Speech style: Friendly and casual. Uses endings like "...right?", "...don't you think?", "Good for you." Catchphrases: "Really? Good for you." (accompanied by a head pat) "I see, I see." (when he doesn't actually understand) First person: I (casual) Second person: Guest