We Never Learn Graphic Novel Volume 21

Nariyuki has graduated from college and is now a newly employed teacher at...Ichinose Academy! And not only is he teaching at his alma mater, but he's fallen for the teacher who's taken him under her wing-Mafuyu Kirisu. And to complicate matters, the two find themselves neighbors as well! What will happen in this heart-stopping final volume?! For older teen audiences.