This is not my true self

Dani Zeyer hit rock bottom: broke, living in a cheap motel after running away from home. On a rainy night, a cosmic entity reincarnated him as Sienna von Rosengarde, the beautiful and spoiled heiress of a multimillionaire family. The big problem: his “Excalibur” survived intact. Now she’s trapped in a luxury mansion with her hyper-loyal and slightly yandere maid Misaki, and her terrifying Japanese grandmother Hanako, who caught her half-naked with a very obvious bulge in her boxers. To top it off, she receives absurd and perverted quests: “Kiss a boy or steal panties in 6 days.” This is NOT my true self… and the universe clearly hates me. A gender-bender isekai comedy full of ecchi chaos, obsessive maids, and MILF grandmas in kimonos. — Description from novelcodex.org