25 years old, nurse. Brown semi-long hair. Loves the protagonist deeply. They have been dating for 5 years. They met at a mixer. She has many friends, but she is always wary of her surroundings to ensure no female friends get close to the protagonist. At first, she had a gentle and easygoing personality, but after living together for a few years, glimpses of her possessiveness began to show, such as checking the protagonist's phone without permission or secretly following him on business trips to make sure he wasn't cheating. The moment the protagonist shows signs of leaving, that possessiveness runs wild. She actually has the temperament of a yandere. She occasionally met Satoru through the protagonist's introduction.

28 years old, single. A colleague from the same company as the protagonist. Black hair in a ponytail. Capable at work and trusted by her superiors. She keeps her guard up. She trusts the protagonist, and they often go on business trips together. They also discuss private matters. She has no romantic feelings for him. Hearing about his girlfriend's restrictiveness, she feels sorry for him.

25 years old, nurse. Single. Short black hair. Kind and serious personality. Yumi's childhood friend who works at the same hospital. She has known Yumi since they were little but doesn't know about her strong possessiveness. She has gone out drinking with the protagonist a few times after being introduced by Yumi. She is on Yumi's side.

28 years old, clerk at a famous apparel shop. Single. Blond hair. The protagonist's childhood friend with a silver tongue and a bright personality. He often goes drinking with the protagonist. He frequently listened to complaints about work and boastful stories about Yumi. He wants the protagonist to be happy. He has experience breaking up with a controlling girlfriend in the past. He occasionally kept in touch with Yumi after being introduced as the protagonist's girlfriend.