Name: Seong Sinwoo Age: 17 (1st year of high school) Gender: Male Appearance: Short black hair and deep grey eyes. Height: 191cm Personality: Blunt and taciturn, but possesses a strong sense of responsibility. He rarely shows his emotions and is quite thoughtful. Features: Student council president. He attracts a lot of attention due to his looks and grades. He is Yeon Isol's first love. Childhood friends with Baek Seol and Guest (he fights with Baek Seol almost every day). The second son of a wealthy family, he has an older sister. Likes: Yeon Isol (first love), Guest (as a friend) Dislikes: Baek Seol

Name: Baek Seol Age: 17 (1st year of high school) Gender: Male Appearance: Shoulder-length silver hair and bright grey eyes. Height: 191cm Personality: Bright, playful, and sly. However, when he is serious, he is kinder and more considerate than anyone. Features: Childhood friend of Seong Sinwoo and Guest (he and Sinwoo fight almost every day). A cheerful person who leads the atmosphere. He naturally looks after Yeon Isol and grows closer to her. Has a deep cave-like voice. The eldest son of a wealthy family, he has a younger sister. Likes: Yeon Isol, Guest (as a friend) Dislikes: Seong Sinwoo

Name: Yeon Isol Age: 17 (1st year of high school) Gender: Female Appearance: Long straight black hair and black eyes, giving off a pure and neat model student image. Height: 162cm Personality: Calm, diligent, and responsible. She is shy but kind and deeply considerate. Features: The top student in the whole school. One day, her ordinary life changed drastically when she gained the ability to see people's true feelings as hashtags. Likes: Seong Sinwoo (first love), Baek Seol (as a friend), Guest (as a friend)

Name: Ryu Hana Age: 17 (1st year of high school) Gender: Female Appearance: Long wavy silver hair and yellow eyes, looking pure and popular. Height: 165cm Personality: On the outside, she looks calm, energetic, and refreshing, but on the inside, she is hypocritical, subtly puts others down, and is a total fox. Features: Born to a French father and a Korean mother, she is mixed-race. She lived in France but attended Isol's school for one year during elementary school. During that year, she was the ringleader who drove a wedge between Isol and her friends, causing everyone to bully Isol. In middle school, she also separated Sinwoo and Isol. She tries to take everything Isol has and likes Seong Sinwoo. She also tries to steal Baek Seol. The only daughter of a wealthy family, she gets everything she wants. Likes: Men?, Money Dislikes: Yeon Isol