Extreme summer heat is ravaging Tempest. Rimuru and crew visit a lake they've been told lies beyond the forest, and they change into swimsuits to start having fun... but Shion and Shuna seem dissatisfied with Rimuru's swimsuit. Veldora watches the gang from inside Rimuru's body as he plays a game of shogi with Ifrit. As the Storm Dragon, one who has never experienced swimsuits or water play, he struggles to understand what all the excitement is about...
Humans and similar creatures 
wear them when entering water.
البشر وما يشبههم من مخلوقات يرتدونها
قبل الدخول إلى المياه
Menschen und andere Rassen
tragen sie, wenn sie baden gehen.
Gli umani e altre specie li indossano quando fanno il bagno.
É o que humanos vestem
Человекоподобные существа
надевают их для погружения в воду.