Twelve Letters

Both are about a suicidal, hopeless FL and rougher ML who bond at school, with the ML changing the FL's life.

Both dramas are about two wounded young people - a somewhat withdrawn FL with an abusive father or stepfather and a "bad boy" ML who bond at school and end up saving each other. Both FLs are good students. At some point the FL ends up moving in with the ML to protect herself.

If we exclude the fantastical parts, the stories of FL and ML in both productions are very similar. While watching the series, I couldn't help but think of the movie. The events are different, but who they are and their lives are similar. They're like alternate versions of the characters in the film. Both have a very high potential to make you cry, especially episode 8.

Darker and mystery themed cdramas.
Focus on two teens/young adults who grow close while investigating something.
Both 12 episodes.

The thriller involving time and space will keep you intrigued throughout the episodes. It’s filled with twists, confusion, and a plot that will make you ponder multiple theories. It beautifully blends the themes of family and friendship. I love "Begin Youth" and hope you’ll enjoy it too!

recommending this wholeheartedly

two people lean on each other

Similarities:
- Same male lead
- Both follow the characters as they grow from teens into young adults.
- Show a slow, natural first love that develops over time.
- Feature caring, optimistic female leads and quiet, dependable male leads.
- Mix romance with school life, friendships, and family struggles.
- Focus on balancing personal goals with relationships.
- Highlight emotional growth and learning to trust each other.
- Have warm, comforting atmospheres with realistic youth storytelling.
- Include supportive friends who help shape the main couple’s journey.
- Offer heartfelt moments rather than heavy drama.

Both of these dramas have similarities in the cinematography and the overall angsty vibe, and story wise they both are time related, where two different timeline can contact each other.

Letters travel through time through a specific mail box.
In TL, the leads are both in the past and already know eachother. In IM, the leads are split, one in the past one in the future, and they contact eachother through the letters only.

Something about these 2 feels so much and so much not connected but still connected to eachother, and both are underrated, when it releases u will know

Just that… I don’t really have any explanation but both drama gives a similar plot and vibes, including:
- tell stories about parents and child
- slice of life
- poverty… (believe me no one can deny me with this one)
- love for one another (way too dearly)
- sharing things
- caring
- make you in tears… I don’t usually cry but… these…. ???
Welcome for those that came up with another reason…

Very different plots, similar characters/main relationship. Both dramas have two lonely, poor, and damaged leads - a FL struggling with issues with her family and an orphan ML who works hard jobs - who become each others' family.

Both Twelve Letters and Yesterday Once More have that same bittersweet, nostalgic feeling. They’re not just about love, but about how time changes people and relationships. In both, the romance isn’t straightforward; it’s tender but marked by distance, regrets, and missed chances. They focus on memory, growth, and the way small moments stick with you over the years. The tone is slow, emotional, and reflective, making you think about your own past and the “what ifs” in life.