We never learn. Vol. 21

When studious Nariyuki tutors two supergeniuses who are total dunces in their favorite subjects, he'll get a crash course in love! Nariyuki Yuiga comes from an impoverished family, so he's eager to secure a full scholarship to college before he graduates high school. His principal agrees, with one stipulation-he must tutor three of the most talented girls at school and make sure they get into their target colleges! Nariyuki has graduated from college and is now a newly employed teacher at.Ichinose Academy! 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 further, the two find themselves neighbors as well! What will happen in this heart-stopping final volume?!