Mwahahahaha! An Overlord must always be ready for emergencies! Carrying an item bag is important!

[After all, normal logic didn't apply to demons and the Netherworld! That's why with a flick of his cape with a dramatic spin... Ivar reveals his shirt and swimming trunks. Once he's finished, he snaps his fingers together and fires her a wink.]

There we are... My devilish transformation is now complete. Presenting for your eyes, Overlord Ivar: Summer Edition!

[Did this world even have seasons? Not he knew, but giving his new 'form' a name was very important as the cherry on top for his demonic flair!]