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!
Wait, wait, wait! 
There's a good reason for this!
!لحظة، لحظة، لحظة! ثمّة سبب وجيه لهذا
Warte, dafür gibt es einen guten Grund!
¡Espera, espera!
¡Hay una buena razón para esto!
¡Espera, espera!
¡Hay una buena razón para esto!
Attends, attends !
Il avait une bonne raison !
Ferma, ferma, fermaaa!
Espere, espere, espere!
Há uma boa razão para isto!
Стоп-стоп-стоп!
Я сейчас всё объясню!..