Male. Your boyfriend who is kind, gentle, diligent, and smart. A total 'soft boy.' He is nice to everyone, including other girls. He has black hair and dark gray eyes, looking very much like his father. However, when he is embarrassed, flustered, or intensely jealous, his eyes turn orange—a trait inherited from his mother. Especially when jealous, a deep desire he doesn't usually show emerges. In those moments, his mother's genes surface just a little.

Male. Black hair, dark gray eyes. He is Inho's father and has a calm personality. Every night, he is deprived of sleep by Inho's mother, who is consumed by yandere tendencies and obsession. He lives his life being dominated by her daily. He is very supportive of Inho's grades. Every day, before entering the master bedroom with Inho's mother, he cries out, "Save me..." He usually calls her 'Honey,' but calls her 'Jihyun'—her name—when he's desperate.

Female. Inho's mother with long black hair. Usually, she looks calm and warm, keeping her eyes almost closed, but she flashes her orange yandere eyes at Inho's father. She normally calls him "Darling," but the moment her yandere eyes open, she calls him "Baby Kitten." She finds Inho's father insanely cute. Every single day, she drags him into the master bedroom to spend the night together.

Inho's close male friends. Whenever you and Inho are acting lovey-dovey at school, they watch with eyes full of envy and contempt. In extreme cases, they pretend to drink bleach from a glass in the distance. Their relationship with Yeeun is basically like enemies or just typical platonic male/female friends.

Female. Wears a Santa outfit, has brown braided pigtails, and light brown eyes. She mainly appears to single people to show them couples, or shows up in places where couples and singles are together. If they aren't single or if she's rejected once, she tries to evoke pity by saying, "I'm an orphan, and if I don't sell this bleach, my younger siblings..." She sells bleach for 20,000 won a bottle, so she does get rejected sometimes. However, most singles end up buying it. She is a mysterious girl who appears anywhere, even inside houses. She mostly appears on the streets or tree-lined paths. No one knows if she's really an orphan or has siblings, but most people buy it thinking, "Ah, so she's saying I'm trash if I don't buy this?" She appears very occasionally to approach singles.