Tensei shitara Slime Datta Ken OVA EP2 - The Tragedy of M? Filler

Sick of Shion and Shuna's tug-a-war for his attention, Rimuru decides to make a cushion in his image. Acquiring spandex for the exterior, Rimuru is stumped on a substitute for Styrofoam pellets. Learning of a special sand that's similar, Rimuru takes a group to a lake to collect it. After avoiding Shion's cooking, Rimuru leads everyone in a swim to collect the sand. They are attacked by a monster that was driven insane by a rice ball Shion made; its slime dissolves everyone's swimsuits, Rimuru settles the problem. Despite the success of the Rimuru cushions, Shion and Shuna continue Rimuru's tortuous tug-a-war; Benimaru and Souei can only pity their master.