What chapter does the anime leave off?

The festival arc(the last episode of the anime) finishes at around chapter 105. Buuut, the events in the festival arc happen differently in the anime, so you’d probably wanna start around chapter 98.

(rough estimate on chapter #s)
And if u watched the OVA it animates the rest of the manga, but it does something like 110 chapters in 4 episodes, so you don't really get the full experience. and also leaves out about 5 chapters.

Probably 91 or closer