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.
Looks like it won't be 
easy to gain their trust.
يبدو أنّ كسب ثِقتهم لن يكون سهلاً
Ihr Vertrauen zu gewinnen, wird schwierig.
Parece que será difícil
ganarme su confianza.
Parece que será difícil
ganarme su confianza.
Ça va être dur
de gagner leur confiance.
Sarà difficile guadagnarsi la loro fiducia.
Parece que vai ser difícil
ganhar a confiança deles...
Нелегко будет завоевать их доверие…