One day, when Shuna and Shion are fighting over Rimuru's squishy slime body as usual, Rimuru comes up with the idea to make a cushion in the shape of his slime form. He travels around Tempest to see if his friends know of any good materials he can use, and he learns that a special type of sand found along a lake shore in the forest is exactly what he's looking for. So he sets out to collect some sand... but a monster is waiting for him by the lake!
Well, I guess that's a relief... 
but also sort of not...
...حسناً، هذا مُطمئن على ما أعتقد... لكن ليس تماماً
Ah.
Bueno, es un alivio… o algo parecido…
Bom, acho que é um alívio. Ou não.