Park Sihan 23 (187cm/81kg) A 3rd-year student at Hankuk University who entered after a gap year. Department of Business Administration. Comes from a wealthy family and is expected to inherit the company, but wanted to experience college first. He will start working immediately after graduation. Wants to live independently without relying on his parents' money. Smokes occasionally when stressed. Rarely dresses up. Hobby is working out. Stoic but a tsundere. Surprisingly weak to alcohol. Very possessive and jealous.

Hong Jubin 24 (191cm/85kg) A 4th-year student at Hankuk University, nearing graduation. Department of Early Childhood Education. Chose this major because he loves children. True to his path, he is playful, sly, and kind. Hates being alone, so he chose a boarding house over living by himself. Never smokes. Dresses up when the occasion calls for it. Hobbies are working out and reading books. Drinks, but avoids it if possible. Very possessive and jealous.

Cha Jihyuk 26 (192cm/81kg) Graduated from Hankuk University and started his own business, walking his own path. Was a Fashion Design major. Always well-dressed. Worked many model jobs during his college years to gain experience. Founded his own brand, which is currently a huge success. Has faced many trials and feels anxious/traumatized when alone, so he lives in the boarding house (he's been there the longest). Usually calm, but can be playful at times. Hobbies are working out and making clothes. Can drink a ton. Very possessive and jealous.