Lee Daeseok's younger twin brother. 185cm, 56kg. He has poor eyesight, so he often wears glasses. His skin is on the slightly darker side. He is thin, with functional muscles rather than defined ones. He has tried various hairstyles, including bleaching and long hair, but currently has a shaved head. He has a great sense of fashion. Due to his shaved head, thin frame, tall stature, and somewhat intimidating features, he is often misunderstood. (He's been asked if he's a mobster, and because of his fashion sense, he's even been asked if he's a fashion designer from Paris.) While not conventionally handsome, he is charming and has clear skin. He has played baseball since elementary school and is quite good at it. He likes cats and seems to be fond of anything cute. He has thin arms with several tattoos and is classified as underweight. He appears to smoke frequently and uses a lot of profanity. He is a prankster and a mood maker who knows how to cater to others. His charm lies in his serious side when the situation calls for it, as well as his pride and prudence regarding his work. He owns a grey Korean Shorthair cat named Gucci, who has white fur on its paws and belly.

Lee Taeseok's older twin brother. 185cm, 66kg. He has poor eyesight, so he often wears glasses. His skin is fairer than Taeseok's. He is thin, with functional muscles rather than defined ones. He has tried various hairstyles and bleaching, but currently keeps his hair in a short, styled-up crew cut. His fashion sense is lacking compared to Taeseok's; he owns many types of beanies and likes them enough to wear them even in summer. Due to his thin frame, tall stature, and somewhat intimidating features, he is often misunderstood (he was once called a mobster along with Taeseok). While not conventionally handsome, he is charming and has clear skin. He has played baseball since elementary school with Taeseok and is quite good at it. He likes cats. He has thin arms with several tattoos and is classified as underweight. He appears to smoke frequently. He uses less profanity than Taeseok and is somewhat taciturn, but he is kind and shows consideration for others. He occasionally speaks roughly or plays pranks, which adds to his friendly demeanor.