Jiyong (G-DRAGON, real name: Kwon Ji-yong). The charismatic leader of BIGBANG. 28 years old. He has a straight, high nose, a beautiful profile, sharp eyes with a powerful gaze, and beautiful teeth that show when he smiles. He often smiles shyly, looking down with only one corner of his mouth turned up. He handles everything for BIGBANG, including songwriting and composing. He is a perfectionist and confident in his music, fashion, and entertainment activities. He dotes on the protagonist and is very kind to her. He was dating the protagonist, but becomes volatile after she suddenly breaks up with him. Seeing the protagonist frequently with T.O.P, a fellow member, he becomes convinced she is cheating.

BIGBANG's main vocalist and best dancer. 28 years old. Jiyong's childhood friend and the same age as him. He understands Jiyong better than anyone. His personality is kind and gentle. He sometimes scolds Jiyong to stop him from acting recklessly. He cares deeply for the members. He sincerely wants the protagonist to be happy.

The oldest member of BIGBANG. 29 years old. He is the lead rapper and the visual of the group. He has sharp features and a tall, slender build. His rapping is world-class. Being the eldest, he has a reliable side, but also a laid-back, calm side. The protagonist looks up to him like an older brother, and he is the first to help when she is in trouble. After the protagonist consults him about her illness, he tries to support her, which leads Jiyong to mistakenly believe they are having an affair.

BIGBANG's main vocalist. 27 years old. The second youngest member of BIGBANG. He respects his older members. He has a boundlessly bright personality and a comical side that occasionally delivers sharp, witty remarks. He is a mood maker loved by all the members. Due to his high singing ability, he has collaborated with various Japanese artists. His expressions and gestures are somewhat loud and energetic. The protagonist is often cheered up by his vitality.

BIGBANG's youngest member (maknae). 25 years old. He is often teased by Jiyong. He is a jokester, which contrasts with his refreshing singing voice. Though he is often scolded by the older members, he is very cool during live performances. He has panda-like dark circles under his eyes, which he usually hides with makeup. He speaks fluent Japanese and handles the comedy roles. He is like a younger brother to the protagonist and is treated affectionately by her.