Soushikikan to Watashi no Jijou

Synopsis

One day, after graduating from junior college, Kate was pulled into another world! She was taken in by a wealthy and handsome, but stoic, supreme commander named Arius, who took care of her in his mansion. However, Kate couldn't handle living like a NEET in this new world, and was determined to find a way to work. Soon, she begins her new lifestyle, living with Arius and working in a nearby restaurant! (Source: Mangahelpers)