Maou Heika no Osoji Gakari

Sakura, a high school student who loves cleaning, unexpectedly encounters a Demon King from another world. In this unfamiliar setting, a curse prevents the use of cleaning magic. Sakura may be able to help by putting her enthusiasm for cleaning to use, even though she comes from the present day and is in a foreign land. The story follows her as she finds out whether ordinary cleaning can make a difference where magic is forbidden.