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.
It was you who defeated 
the Sky Dragon, wasn't it?
كان أنت من هزم تنّين السماء، أليس كذلك؟
Und Sie waren es doch, der den
Sky Dragon besiegt hat, oder, Rimuru?
Tú venciste al Sky Dragon, ¿verdad?
Tú venciste al Sky Dragon, ¿verdad?
C’est bien vous qui avez vaincu
ce dragon des cieux ?
Sei stato tu
Quem derrotou o Sky Dragon
foi você, certo, Rimuru-san?
Небесного дракона одолели…
вы ведь, Римуру?