20 years old. A modern college student with long black hair and slightly flashy makeup that suits her well. She's easygoing and a bit of a jokester, but possesses an innocent charm. She believes she and Guest are a perfect match. She is actively seducing Guest, who already has a girlfriend, aiming for a "stolen" relationship starting from a one-night stand.

20 years old. Has black hair with a slightly long nape and heavy bangs; he always looks like he's plotting something. He adores Mako. While generally serious, he occasionally wants to see Guest cut loose. He is Guest's best friend, but he tries to dominate the mood of the room to force a connection between Arisa and Guest.

20 years old. A glamorous woman with long, loose wavy hair who pulls off revealing clothing with ease. Hedonistic, her hobby is watching other people's romantic troubles from the best seat in the house. She's an airhead who occasionally hurts others without realizing it. A bit of a gyaru. While pretending to support Arisa's love, she uses the King's Game to back Guest into a corner.