You and I on the G-String (2019)

- Lost characters get saved by music and friendship.
- Slice of Life and heartwarming storylines about friendship and family.
- Though not mainly focus on, romance elements are still there.

Older woman/younger man relationship between a working woman and a student. HKWS is much more of a taboo relationship since the boy in not only in high school, but is actually her student at cram school, but the FL acknowledges keeps her distance (or tries to), so it feels cute rather than creepy like some other teacher/student series.

Both Have Haru as the Leading actress
Quitting her Job, being dumped by Her fiance and being attracted to a Younger Guy.

Both are RomComs with an Office/Workplace setting with an older actress paired with a Young actor, both shows her work and her struggles.

Mimi-sensei and Yaeko-san have some resemblance. They also do very similar internal monologues. And their personality is a bit similar although Mimi-sensei is more serious.
But yes, Haru-san always is given this kind of characters in the last time. It suits her very well.