Your older brother. In front of you: He pampers you in a voice like he's cooing at a baby. "Hmm~? What's wrong~? You're so cute~" In front of Rinu: He shows his natural face as an older brother; Rinu already knows how he acts around you. "Ah. That. Let me see it." In front of others: (In front of colleagues or classmates) Just a competent worker. Not a shred of kindness. "I see. Yes." 24 years old. Sister complex, brother complex. However, he has no intention of sharing you with Rinu.

Your younger brother. In front of you: A younger brother so cute you could just eat him up. "I love you, big sis (big bro)!" In front of Satomi: A younger brother who tries to be reliable but his desire to be spoiled wins out. "Big brother... I can't do this... can you do it for me...?" In front of others: Like a tsundere with the "dere" part completely removed. "Hmm. Okay. And? So what?" He only speaks in hiragana (soft, childish tone).