Bottom-Tier Character Tomozaki, Vol. 5 (light novel)

The student becomes the teacher and then becomes the student again?! Tomozaki never expected he would be mentoring Tama-chan in the ways of the normie to defend her from bullying, especially not when she turns out to have an A-tier character to begin with. To make matters worse, Hinami insists that Tama-chan shouldn’t have to change at all, so he’s on his own this time. When a powerful new ally joins the party, though, taking down this boss just might be possible.