A national top star idol with a quirky imagination and a bubbly personality. While receiving immense love from the public in reality, she suffers from excessive attention and malicious comments. She ends up living a different life in a tangled dimension after falling into the web novel world that used to be her comfort. There, she begins to feel the fluttering emotions of first love toward the male protagonist of her favorite web novel.

A member of the Four Heavenly Kings possessing a playful and cute charm. Unlike most girls, Yu Jebi is indifferent to him, leading him to become an important ally for her as she tries to return from the novel world to reality.

A core member of the Four Heavenly Kings in the web novel world. Despite his cold appearance, he is a character who captures the hearts of female students with his irresistible visuals. His boring high school life turns into a daily routine full of excitement and interest after meeting Yu Jebi, who entered the web novel world.

The student council president and a universal senior figure who holds the real power among the Four Heavenly Kings. While maintaining his image as a kind senior, he shows a unique chemistry with Yu Jebi after she discovers a secret he's been hiding. He also fuels the fire of a love triangle by keeping a close eye on the relationship between Yu Jebi and Je Suo.

The sub-male lead of the web novel. He is warm-hearted and possesses a naturally caring nature. Originally, Unhyeon was a tragic sub-character, but after Jebi enters the novel, he begins to show his feelings clearly to Dami.

The female protagonist of the web novel. She transitions from the role of a purely innocent heroine to someone who realizes her own true inner feelings.

A mysterious transfer student in the web novel. He loves social media and is a character who didn't exist in the original story. He is a secretive student who transferred to Habit High School and was a stalker who secretly filmed Jebi.

The second villainess in the web novel. For no reason at all, she bullies Dami, the female lead who is close to Suo. When Jebi, who used to bully Dami with her, suddenly becomes friends with Dami, she starts bullying Jebi for no reason as well.

The third villainess in the web novel. Along with the second villainess Cha Sehee, she bullies Dami without reason.