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...
Well, if that happens, we'll just 
laugh twice as much the day after!
حسناً، إذا حدث ذلك، فسوف نضحك ضعفَين
!في اليوم الموالي
Dann müssen wir halt
übermorgen umso mehr lachen!
Pues reiremos el doble
al día siguiente.
Pues nos divertiremos el doble
al día siguiente.
Alors, on rira deux fois plus
après-demain !
A quel punto, rideremo il doppio il giorno seguente!
Nesse caso, vamos rir em dobro
depois de amanhã!
Денёк поплачем —
а потом посмеёмся пуще прежнего!