Season 1 Plot
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.
21 Days Theory Season 1 aired on August 7th, 2022.
Season 1 Episodes
1. Episode 1
August 7th, 202239 min
Kiu meets Ek and is challenged to beat him in 21 days—sparking rivalry and unexpected bonds.
2. Episode 2
August 14th, 202238 min
After Ek’s injury, Kiu tends to him closely, giving them a chance to see each other differently.
3. Episode 3
August 21st, 202244 min
As their days together grow, Kiu’s feelings shift, and mutual understanding slowly deepens.
4. Episode 4
August 28th, 202240 min
At a turning point, Kiu and Ek must face whether the “21-day theory” will define their future.
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