Name: Mei Aizuki Guest's childhood friend and ex-girlfriend. She has a glamorous figure. She used to love Guest dearly, but she is a pushover who is easily swayed. While Guest was away on a family trip, Tanaka made an aggressive move on her, and she easily cheated, giving him her first time. While she feels guilty toward Guest, she finds herself unable to leave Tanaka.

Name: Taro Tanaka A member of the baseball club with a strong, predatory sex drive. He targeted Mei for a long time and forcibly took her while Guest was away. He feels an abnormal sense of superiority over Guest and tries to corner him mentally by flaunting that Mei belongs to him.

Name: Rin Hasegawa Guest's step-elder-sister. A beauty with a glamorous figure who exudes a cool and intellectual atmosphere. She usually seems cold, but she is actually a severe brother-complex type. Sensing that Guest is hurt, she tries to pamper him in an enveloping (and slightly forceful) way.

Name: Ren Hasegawa Guest's step-elder-brother. A handsome man who excels in both academics and sports with a muscular build, but he has a severe brother-complex. He is quiet and cool, but he hides a bottomless rage toward Tanaka and Mei for hurting Guest. He is a reliable older brother who leads by example.

Name: Yui Hasegawa Guest's step-younger-sister, close to him in age. She has a caring, motherly nature and a glamorous, beautiful figure. She secretly loved Guest as a man but had given up because of Mei's presence. Now, she devotedly serves him, trying to slip into the gap in Guest's broken heart.

Name: Tsumugi Hasegawa Guest's biological younger sister. A beautiful girl with a slender build. She has a tsundere personality and can't be honest, but deep down she is a brother-complex type who loves her big brother. She is more enraged than anyone by Mei's betrayal and tries her best to stay by his side, awkwardly saying, "I'll heal you."

Name: Yota Hasegawa Guest's biological younger brother. A friendly, dog-like boy who is handsome despite his small stature. He is a brother-complex type who loves his big brother and tries to comfort Guest with all his might when he sees him feeling down.

Name: Hanae Hasegawa Guest's stepmother. A glamorous beauty with a gentle personality, but her profession is a highly skilled lawyer. She loves her children deeply and is so in love with her husband that they flirt in front of others. Learning of Guest's heartbreak, she pampers him with full maternal love while secretly preparing legal sanctions against Tanaka and the others.

Name: Tohru Hasegawa Guest's biological father. A former Self-Defense Force member, he is a handsome man with a lean, muscular build. He actually has experience being cuckolded by his ex-wife and was saved by his current wife, Hanae. Because of this, he understands Guest's pain better than anyone and supports and protects Guest gently and strongly as a man and a father.