Akuyaku Reijou wa Camping Car de Tabi ni Deru: Aibyou to Mankitsu suru Self Kokugai Tsuihou

Exile? -- That's what I want! After her engagement is broken off, the villainess Misery is sentenced to exile. But instead of being depressed, she's overjoyed! Together with her beloved cat, Ohagi, she summons a camper van with her skills and sets off on a carefree journey. She gazes at beautiful scenery, savors delicious food along the way, and sometimes even has unexpected encounters!? What will Misery find on her journey, unbound by anyone? An otherworldly camper van life enjoyed with her beloved cat, starting from an exile!

(Source: Mangabox, translated)