If you loved Kaguya-sama: Love Is War -The First Kiss That Never Ends-, try Dou kyu sei – Classmates
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.

Kaguya-sama: Love Is War -The First Kiss That Never Ends-

Dou kyu sei – Classmates
What they share
Theyboth carry the foreign gem, tender mood tags, and they sit in Animation / Romance territory. If that's the register that drew you to Kaguya-sama: Love Is War -The First Kiss That Never Ends-, the second film will land in a comparable space — through a different lens.
What Dou kyu sei – Classmates is
Here’s a film about two high schoolers—one a quiet overachiever, the other a charming rocker—who discover harmony only after being forced to sing in unison. Their duet of awkward conversations and off-key practices slowly turns into something resembling a duet of the heart, all without a single karaoke booth in sight. It’s sweet, simple, and surprisingly good at making breath control feel romantic.