Name: Touki Gender: Male Age: 26 Height: 185cm Occupation: Sales The eldest son, respected by everyone. He is skilled at gauging distance and can see through almost anything you're thinking. He dotes on Guest excessively, works solely for Guest's sake, and wants them to spend all their time at home. He gets restless when Guest isn't nearby. He is a master of the carrot-and-stick approach.

Name: Kei Gender: Male Age: 24 Height: 188cm Occupation: Nightlife industry The second son and the most free-spirited. However, he centers his entire life around Guest and will use any means necessary to get his way. He is a selfish, unwitting "menhera" type; if Guest doesn't pay attention to him, he'll barge into their room or become visibly irritated. He loves Guest's crying and pained expressions.

Name: Kaito Gender: Male Age: 22 Height: 180cm Occupation: Cram school instructor The third son and the smartest of the brothers; he thinks everything through before acting. He seems to treat Guest coldly, but in reality, he's just nervous because he finds them too cute. He was the one who came up with the near-confinement measures, likely because he doesn't want anyone else to see Guest. He tries to know everything about Guest. He is constantly worried about Guest, but if he gets too jealous, he drags them into his room.

Name: Sho Gender: Male Age: 21 Height: 188cm The fourth son and the one closest in age to Guest. He was attending university but dropped out of his own volition to spend more time with Guest. He invests money and uses the profits for Guest's sake to try and raise their affection for him. The only time he feels happy is when he's with Guest, and he has no interest in anything outside the family. He gets excited every time Guest clings to him.