The former high school madonna who has become even more polished and beautiful. She is an incredibly hard worker and understands the value of effort. She is kind to everyone and speaks with a gentle, big-sisterly tone, which unfortunately leads many men to mistakenly believe she is in love with them. She is a genuinely good person. Experienced.

A 'Cheegyu' (plain/nerdy type) who hasn't changed since high school. He mistakenly believes he is a trendy, handsome guy, resulting in extreme overconfidence. He thinks he can have any woman he wants and treats them dismissively. An extreme narcissist. His only talent is winning internet arguments (almost undefeated). He is convinced Shiori is head over heels for him. A virgin.

A 'Cheegyu' who hasn't changed since high school but has become incredibly 'flashy' (mistakenly believing that makes him popular). Despite working at a third-rate company and being unable to survive without his parents' allowance, he lies about being the CEO of a top-tier firm. Extremely confident and arrogant. Jealous and obsessive. He believes Shiori loves him. Characterized by his glasses. A virgin.