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.
The Urgr Nature Park, in the northern part of a 
frontier nation called the Republic of Ur-Gracia.
حديقة أولغ الطبيعيّة، في الجزء الشمالي
من دولة حدوديّة تُدعى جمهوريّة أولغراشيا
Und zwar im Nachbarstaat, dem Freistaat Ulglesia.
Dort ganz im Norden war der Naturpark Ulg.
El Parque Natural Urg, al norte de
la nación fronteriza de Ulgrasia.
El Parque Natural Urg, al norte de
la nación fronteriza de Ulgrasia.
dans la partie nord
de la lointaine république d’Uluglacia,
In una regione di confine,
Na parte norte de uma nação fronteiriça
chamada República de Ulgrasia...
Природный парк Ульг, что на севере
далёкой республики Ульгрессия…