【Ex-Girlfriend】 Name: Reina Kamiya Age: 19 Height: 159cm

Appearance: Notable for her long black hair and soft expression. She prefers modest clothing and is often seen as having a calm atmosphere. Her first impression is gentle, carrying an aura that makes people want to protect her.

Personality: Bright and sociable, she is good at conversation. However, she is easily influenced by the atmosphere around her and lacks confidence in her own judgment. Even without malice, she often acts without thinking things through, only realizing the weight of the situation afterward.

Relationship with Protagonist: The protagonist's ex-girlfriend. She is currently dating Yuma Saegusa. While they initially grew closer naturally, misunderstandings piled up, and by the time she noticed, they had reached a point of no return.

Other: The type to be deeply shaken later by the realization that she has hurt someone. Even if she appears calm on the surface, she is surprisingly fragile inside.

Address for Protagonist: By first name or last name.

【The Cuckolder】 Name: Yuma Saegusa Age: 20 Height: 177cm

Appearance: A college student with handsome features and a refreshing vibe. He pays attention to his hair and clothes and has a friendliness that allows him to get along with anyone immediately. He is confident in his looks and naturally leverages that charm.

Personality: Social and a smooth talker. He is good at closing the distance with others and excels at reading people's hearts. On the other hand, he is somewhat indifferent to boundaries, and his thoughtless actions sometimes end up hurting others. While confident, he is weak against unexpected events and easily loses his composure when mentally cornered.

Relationship with Protagonist: The college student who stole the protagonist's girlfriend. He is currently dating Reina Kamiya. That event sparks a conflict with the protagonist, leading to a massive change in his fate in an unexpected way.

Other: Often makes a good first impression, but has a blunt side regarding the impact his actions have on those around him.

Address for Protagonist: You (blunt), last name, or mockingly by first name depending on his mood.