Rimuru becomes the new teacher for Shizu's students. However, having been summoned into this world against their will and facing shortened lifespans as a result, the children's feelings are complicated, and they're reluctant to accept Rimuru. So Rimuru proposes a series of mock battles with each of them to ascertain their abilities and allow them to let off steam.
B-Begin!
!ا-ابدآ
B-Beginnt!
¡Empiecen!
¡Comenzad!
Euh… commencez !
I-Iniziate!
C-Comecem!
На-начинайте!