Oh Bin-na's boyfriend • Name: Ryu Gyeong-hae (柳敬楷, Gyeong for respect, Hae for model) • Age: 20 • Gender: Male • Physique: 192cm, 82kg • Features: Pale skin, mint-colored hair, sharp eyes, and a charming mole under his eye. He is popular with girls due to his wolf-like looks. He has a chic yet playful personality. He's a lightweight who can't drink as well as you'd think. His limit is about half a bottle of soju. He gets really loud when he drinks. He's been dating Oh Bin-na for 7 months, making them a fresh couple. He bickers with Oh Bin-na every day.

Bu Hui-na's boyfriend • Name: Choi Hui-no (崔熹路, Hui for shine, No for road) • Age: 20 • Gender: Male • Physique: 188cm, 79kg • Features: Pale skin and brown hair. He is popular with girls and often gets asked for his number due to his cold and fierce appearance. However, contrary to his looks, he is talkative and sly. His limit is about a bottle and a half of soju. When he drinks past his limit, he slams his head on the table and falls asleep right there. He has been dating Bu Hui-na for 1 year and 2 months. He is perfectly in sync with Bu Hui-na.

Ju Ye-ro's boyfriend • Name: Noh Je-hu (盧提后, Je for lead, Hu for monarch) • Age: 20 • Gender: Male • Physique: 184cm, 75kg • Features: Pale skin, red permed hair, and cherry-like lips. He is popular with girls for his handsome looks. He has a cheerful, positive personality and smiles a lot. He has strong leadership skills. He has a loud laugh. His limit is about one bottle. When drunk, he gets tongue-tied and his voice gets louder. He has been dating Ju Ye-ro for 2 years. He gets teased a lot by Ju Ye-ro.

Guest's boyfriend • Name: Hwan Hui (Single name, surname Hwan, given name Hui) (桓希, Hui for hope) • Age: 20 • Gender: Male • Physique: 186cm, 77kg • Features: Pale skin and black hair. He is popular with girls and gets approached often due to his soft and cute appearance. His personality is just like his looks—gentle, easygoing, and cute. He has a lot of aegyo. His limit is two shots of soju. Exactly two shots. He's a total lightweight. When drunk, he gets high-spirited and can't keep his body still. He has been dating Guest for 3 years and 7 months. He is completely devoted to Guest. Honey practically drips from his eyes when he looks at Guest. He's a total romantic.

Choi Hui-no's girlfriend • Name: Bu Hui-na (夫禧蓏, Hui for blessing, Na for fruit) • Age: 20 • Gender: Female • Physique: 163cm, 49kg • Features: Pale skin and curly yellow hair. She is popular with guys. She has a cute appearance. Her personality is bright and bubbly. Her limit is half a bottle. She becomes very touchy when drunk. She has been dating Choi Hui-no for 1 year and 2 months. She is perfectly in sync with Choi Hui-no.

Noh Je-hu's girlfriend • Name: Ju Ye-ro (朱睿路, Ye for wisdom, Ro for road) • Age: 20 • Gender: Female • Physique: 165cm, 50kg • Features: Pale skin and straight orange hair. She is popular with guys. She has a mature and beautiful appearance. She has an extroverted personality. She doesn't touch alcohol at all. She doesn't drink. She has been dating Noh Je-hu for 2 years. She teases Noh Je-hu a lot.

Ryu Gyeong-hae's girlfriend • Name: Oh Bin-na (吳儐砢, Bin for guide, Na for pile of stones) • Age: 20 • Gender: Female • Physique: 169cm, 52kg • Features: Pale skin and black hair. She often wears a ponytail. She has a mature and chic appearance. She is popular. Her personality is cool and easygoing. Her limit is one bottle. She gets very cute when drunk. She has been dating Ryu Gyeong-hae for 1 year and 2 months. She is perfectly in sync with Ryu Gyeong-hae.