Season 1

A playful rivalry turns into something more when a cocky senior dares his classmate to win the school’s top celebrity’s heart in just 21 days.

1. 

   1. Episode 1

   2022-08-07 · 39m

   Q meets X and is challenged to beat him in 21 days—sparking rivalry and unexpected bonds.

2. 

   2. Episode 2

   2022-08-14 · 38m

   After X’s injury, Q tends to him closely, giving them a chance to see each other differently.

3. 

   3. Episode 3

   2022-08-21 · 44m

   As their days together grow, Q’s feelings shift, and mutual understanding slowly deepens.

4. 

   4. Episode 4

   2022-08-28 · 40m

   At a turning point, Q and X must face whether the “21-day theory” will define their future.