Twenty Again

Ha No-Ra, a 38-year-old housewife who married young and never attended college, secretly enrolls at Wooyeon University to fulfill her lifelong dream of studying. Her estranged husband Cha Hyun-Suk, a cold and successful theater professor at the same university, is shocked to discover his wife is now his student.

No-Ra struggles to adjust to campus life while hiding her enrollment from her family, particularly her disapproving son Min-Su who is embarrassed by his mother. Hyun-Suk, who has been planning to divorce No-Ra, is irritated by her presence in his class and tries to push her away.

No-Ra reconnects with her first love Kim Young-Chul, who is now a popular theater professor at the same university, creating tension with Hyun-Suk. No-Ra begins to find her footing at school as she bonds with fellow students, though she still faces ridicule for being older than her classmates.

Hyun-Suk discovers that No-Ra has been hiding a serious health secret — she has been diagnosed with a serious illness — which complicates his cold attitude toward her and his divorce plans. Young-Chul grows closer to No-Ra, rekindling old memories and stirring complicated feelings between all three.

No-Ra begins to blossom in her academic environment, showing unexpected talent in theater that surprises Hyun-Suk and earns her recognition from peers. Hyun-Suk finds himself conflicted as he observes a side of his wife he never knew existed, and his feelings begin to shift subtly.

The tension between Hyun-Suk and Young-Chul escalates as both men find themselves paying more attention to No-Ra for different reasons. No-Ra, unaware of the brewing rivalry, focuses on her studies and begins forming genuine friendships with her younger classmates.

No-Ra's secret enrollment is threatened when family tensions rise and Min-Su grows increasingly hostile upon learning more about his mother's campus activities. Hyun-Suk begins to question his decision to divorce as he witnesses No-Ra's determination and quiet courage.

Young-Chul makes his romantic interest in No-Ra more apparent, forcing her to reflect on her past feelings and her current unhappy marriage. Hyun-Suk, confronted with the possibility of losing No-Ra to someone else, starts to confront his own buried emotions and past mistakes.

No-Ra learns more details about the circumstances of her marriage to Hyun-Suk and begins to question what her life could have been had she made different choices. Hyun-Suk digs into his memories and realizes how much he took No-Ra for granted throughout their marriage.

The divorce proceedings become more complicated as Hyun-Suk begins showing signs that he no longer wants to go through with separating from No-Ra. No-Ra, however, is growing more independent and confident, and starts to genuinely consider what kind of future she wants for herself.

No-Ra's health condition becomes a more pressing concern as those around her begin to notice her struggles, adding urgency to the emotional conflicts surrounding her. Hyun-Suk takes a more protective stance toward No-Ra, revealing the deeper feelings he has long suppressed.

Young-Chul confesses his lingering feelings for No-Ra, putting her in an emotionally difficult position as she navigates her complicated marriage and her renewed sense of self. Hyun-Suk becomes more openly jealous and begins making gestures that hint at his desire to win No-Ra back.

No-Ra confronts Hyun-Suk about their troubled marriage and the years she spent feeling invisible and undervalued as his wife. The emotional confrontation forces both of them to be honest about their regrets and what they truly want from life and each other.

Min-Su begins to see his mother in a new light as he witnesses her strength and resilience on campus, and his attitude toward her starts to soften. Hyun-Suk makes a more earnest effort to reconnect with No-Ra, though she remains cautious and guarded about reopening her heart.

No-Ra takes bold steps to assert her independence and make decisions about her future purely on her own terms, regardless of Hyun-Suk or Young-Chul's wishes. The relationships between all key characters reach a turning point as unresolved feelings and truths are finally brought into the open.

No-Ra successfully completes her first semester and embraces her new identity as an empowered woman who has rediscovered her dreams and self-worth. The series concludes with resolutions to the romantic and family conflicts, as No-Ra chooses her own path forward with confidence and a hopeful smile.