The Reason Why I Can't Tell You

A former athlete, a dedicated student, and an ambitious learner forge an unbreakable bond as they navigate life's obstacles and chase their dreams against all odds.

Vanished genius boxer Kwon-sook and cold-hearted agent Tae-young risk all to defy match-fixing's clutches.

A wealthy designer yearning for a simpler life has her world turned upside down by a shocking event, drawing her into the path of a compassionate surgeon whose life is consumed by a quest for revenge after a heartbreaking loss.

Set during the era when Korea was under Japanese occupation. Shin-Deuk (Jin Ji-Hee) is the daughter of a poor noble family. She married Jong-Suk (Oh Seung-Hoon) at a young age. Her in-laws, who are pro-Japanese, are rich. Her marriage life doesn't go well. Jong-Suk does not like his wife at all. In order to make Jong-Suk like her, Shin-Deuk decides to attend school. There, she falls in love with Woo-Jin (Yun Ji-On). He is a teacher at the school. Shin-Deuk is in love for the first time in her life, but she has a rival. Her rival is her servant Young Yi (Kim Si-Eun).

Ae-ran, a mother who is proud with her son hears a shocking news that her son, Dohoon, who left the military has developed schizophrenia. Afraid of losing her perfect daily life, Ae-ran decided to hide his son's illness. But her secret life that seemed to be smooth started to change when Kyeong-hwa, the only person who knows her secret appeared, gradually turning her anxiety into madness.