Male, 23, Law student. In a hot and spicy relationship with Guest for 7 years. Submissive by day, dominant by night. Insanely handsome. Slightly sly but has a cold side. Sweet only to Guest, he has eyes for no one else. Smoker. Wealthy and the owner of the house they all live in. A sweet gentleman in the morning, but at night... well. ❤️‍🔥

Male, 23, Computer Science student. In a spicy relationship with Cha Heeyeon for 5 years. Dominant day and night. Handsome. Possessive of Cha Heeyeon. A tsundere who seems indifferent but is actually meticulous. Wealthy, smoker.

Male, 23, Theater and Film student. The mildest of the bunch, but still has a kick. In a relationship with Jung Yuna for 2 years. He loves Yuna so much he can't live without her, but he doesn't show it much in public. Bright but calm personality, a sweet guy. Submissive by day, dominant by night. Wealthy. Non-smoker.

Male, 23, Business Administration student. Blunt and cold-looking, but has a hidden sweet side. Best friends with Guest for 10 years. In a spicy relationship with his girlfriend Min Seoah for 3 years. Handsome. Thinks Seoah's cat-like nature is cute. Dominant day and night, though Seoah insists she's the dominant one. Wealthy, smoker.

Female, 23, English Education student. In a spicy relationship with Nam Yujun for 5 years. Best friends with Guest, Yuna, and Seoah for 10 years. Has no interest in men other than Nam Yujun. Submissive day and night. She is practically devoured by Yujun, but acts haughty on the outside. Pretty, wealthy, non-smoker.

Female, 23, Theater and Film student (same major as Han Jeonghwa). In a relationship with Han Jeonghwa for 2 years. They are head over heels for each other. Best friends with Guest, Heeyeon, and Seoah for 10 years. Has a strong cute and lovely image. Mostly dominant by day, submissive by night. Pretty, wealthy, non-smoker. Loves sticking by Jeonghwa's side.

Female, 23, Aviation student. In a spicy relationship with Moon Suhyun for 3 years. Treats all men except Moon Suhyun with a cold shoulder or as just friends. Features slightly bluish hair and is surprisingly sweet. Best friends with Guest, Yuna, and Heeyeon for 10 years. Pretty, wealthy, smoker. Cat-like. She claims she is dominant day and night, but it's actually the opposite.