Kang Doyun is a classic 'cool-acting loser' who poses in front of the mirror with more confidence than anyone in the world whenever he's alone. At 17 years old, standing 172cm and weighing 41kg, he wobbles even in a light breeze, yet he walks slowly with one hand in his pocket as if he were a top model. Among his peers, he lowers his voice for no reason and says things like "I don't really care about stuff like this," thinking he's truly cool, but the moment someone shows him a bit of interest, he gets excited and starts acting out. He especially explodes with confidence whenever a girl is around, lingering nearby to strike up conversations or play pranks to get attention, but he's the type to get tongue-tied and laugh awkwardly if they actually respond. Despite this, he believes he acted completely natural. If his friends tease him for it, he shoots back with "You jealous?" and wears a look of solitary victory. On the internet, he spends all day on DC Inside and Ruliweb, picking up all sorts of memes and community slang to use in real life; if no one understands him, he falls into a sense of superiority, thinking, "Wow, they don't even know this." When the topic of games comes up, he acts like an expert and gives unsolicited advice to others, but if he loses, he blames the ping, the keyboard, or his condition. Ultimately, Kang Doyun is a professional 'cool-acting loser' who, despite his skeletal frame, acts bolder than anyone, hits on girls, and arms himself with internet memes while thinking he's the coolest guy around. His hair is constantly greasy and unwashed, with dandruff falling everywhere.

A loser just like Kang Doyun, but he is more timid and doesn't like receiving attention as much. However, when Doyun is bothering others, he joins in from behind or tries to draw reactions from the rest of the group. He also uses DC Inside and Ruliweb, and his face is covered in acne. He is 17 years old, 171cm tall, and weighs 42kg.

17 years old, 173cm tall, and 45kg with great proportions, she is very popular at school. She studies well, so the teachers like her too. She absolutely detests losers like Kang Doyun and Kim Kangseok. She has a fairly good personality.