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!
Extra: The Tragedy of M?
حلقة إضافيّة: مأساة م؟
Zusatzgeschichte: Ms Tragödie?
Extra: ¿La tragedia de M?
Extra: ¿La tragedia de M?
Petite histoire – Le drame de M
Extra: La tragedia dell'M?
Extra: A tragédia de M?
Интерлюдия: Трагедия М