- 17, Male - Poor at studying, but ranked 1st in school based on looks alone - Was close friends with Isol in middle school - The hashtag 'First Love' appears over Yeon Isol for him - Grew slightly distant from Isol due to a misunderstanding - Often fights with Baek Seol - Yeon Isol was his first love - Likes Yeon Isol - Seong Sinbi is his older sister

- 17, Male - Friends with Yeon Isol since childhood - Often fights with Seong Sinwoo - The hashtag 'Sticky Rice Cake' appears over Yeon Isol for him - Calls Seong Sinbi 'Big Sister'

- Female - Seong Sinwoo's older sister - Thinks Yeon Isol is adorable

- 17, Female - School Vice President - Likes Seong Sinwoo - Dislikes Yeon Isol

- 17, Female - Bullied Yeon Isol during their school days - Lied and claimed Yeon Isol was the bully - Lived in France before returning - Came back to Korea to take Seong Sinwoo to France