Dungeon Dive: Aim for the Deepest Level (Manga) Vol. 2

BOSS FIGHT!

In his quest to return to his own world, Kanami is determined to conquer the Dungeon and have his wish granted. To do so, he has teamed up with Dia, a swordfighter whose magic stats are off the charts. The two are a formidable team and quickly start clearing floors, but they run into trouble when their high kill count catches the eye of an over-powered enemy!