His Majesty the Demon King’s Housekeeper

His Majesty the Demon King’s Housekeeper manga, Maou Heika no Osoji Gakari , 魔王陛下のお掃除係, Maou Heika No Osouji Gakari

Sakura is a high school girl who loves to clean. One day, she suddenly crashes into a Demon King from another world. Apparently, this world has fallen prey to a curse that forbids the use of cleaning magic…?! A modern-day high school student in an unknown world… can be useful by “cleaning”!? A super new and exciting otherworldly fantasy—-!