Two stories. Two hearts. One thread. As Ari's feelings for Hyunwoo deepen, friendship, jealousy, and fate twist around her world. But this time, love doesn't walk alone-another bond blooms beside hers, proving that every heart carries its own rhythm.

A quiet girl. A new teacher. A love written between equations. Every love finds a story, and every story holds its love. Ari Han never expected her calm, ordinary days to be rewritten by Hyunwoo Kim-the new Maths teacher who feels both distant and strangely familiar. Between whispered formulas, shared umbrellas, and secrets stitched into diaries, Ari learns that love isn't always loud-it's handmade, piece by piece.