Chugakusei Nikki (2018)

Both have vast age gap between leads. Though focus of the shows are in different directions both are top-notch in quality

Native Title: ?????
Also Known As: Junior high school diary , Meet Me After School , Chu-Gakusei Nikki , Chuugaku Seinikki
Screenwriter: Kaneko Arisa
Director: Tsukahara Ayuko, Tsuboi Toshio, Takemura Kentaro
Genres: Romance, Youth, Drama
Tags: Forbidden Love, Older Woman/Younger Man, Taboo, Disapproving Parent, First Love, Infidelity, Time Skip, Student-Teacher Relationship, Adapted From A Manga, Lovers Separated

This is a love story between Akira Kuroiwa, a 15-year-old boy who knows nothing of love, and Hijiri Suenaga, his new 25-year-old homeroom teacher. One fated summer, Akira begins to realize he has feelings for Hijiri, but Hijiri has a long distance fiancee. The story follows the pair over the course of several years.

A psychological drama about unhealthy interpersonal relationships explained often through elaborate flashbacks. Takanako Mayuko, who grew up in an idyllic mansion with the perfect loving family, blames her childhood best friend for everything that has gone wrong in her life. While maintaining the façade of friendship, Mayuko finalizes the revenge she’s been secretly plotting for decades.

Also Known As: Junior high school diary , Meet Me After School , Chu-Gakusei Nikki , Chuugaku Seinikki
Screenwriter: Kaneko Arisa
Director: Tsukahara Ayuko, Tsuboi Toshio, Takemura Kentaro
Genres: Romance, Youth, Drama
Tags: Forbidden Love, Older Woman/Younger Man, Taboo, Disapproving Parent, First Love, Infidelity, Time Skip, Student-Teacher Relationship, Adapted From A Manga, Lovers Separated

Both ~10 years age gap and as per title the older FLs are quite rational
Strong hardworking FLs
The leads are great actors
Both First love (for ML :P)
Pestering moms in both (More so in Chugakusei Nikki)
Chinese one is definitely a lighter watch after Chugakusei Nikki

A love story between a young FL teacher & ML student in junior high school. So many obstacles & troubles for them to be together. 1 of my favorite school romance drama & OST also good. Okada Kenshi soooo adorable. Worth watching drama & must rewatch again. Based on manga/comic book.

This is a love story between Akira Kuroiwa, a 15-year-old boy who knows nothing of love, and Hijiri Suenaga, his new 25-year-old homeroom teacher. One fated summer, Akira begins to realize he has feelings for Hijiri, but Hijiri has a long distance fiancee. The story follows the pair over the course of several years.

Both dramas are about a relationship between a male student and a female teacher in high school, age gap and forbidden love.

The directing is similar, with great lighting that creates similar tones. They both have characters that seem truly real.

20 years ago, Kei, a 23 year-old highschool teacher, fell for a student, Hitoha, a beautiful girl, but lost her from a tragic car accident. He’s now a middle aged factory worker who has just quit the job to visit Klavan in Ukraine. There lies a beautiful railway called Tunnel Of Love, where people say you can meet with your deceased beloved one. A freight transport runs once a day and it is said that the train takes someone you wish to meet

Both are sweet stories of early love and how it stays with people even as they grow older. They are both real and raw.

A younger guy falling for an older female teacher. However one is a student while the other is a professional dancer.

both are extremely good in their own way. There are differences but follow a similar theme ie older woman x younger guy

Same female teacher and younger male student. While chugakusei nikki is more melodramatic, biscuit teacher and star candy is more funny.