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.
Shizu-san entrusted you to me, 
and I won't abandon you.
ائتمنتني شيزو-سان عليكم ولن أتخلّى عنكم
Shizu hat euch mir anvertraut.
Ich lasse euch nicht im Stich.
Shizu me los confió y no los abandonaré.
Shizu os dejó a mi cuidado
y no voy a abandonaros.
Shizu m’a confié une mission.
Je ne vous laisserai pas tomber !
Shizu mi ha chiesto di prendermi cura di voi
Shizu-san confiou vocês a mim,
e eu não vou abandoná-los.
Я ни за что не брошу тех,
кого мне доверила Сидзу.