Namaiki Little Prince

"Don't you like me, sis?" Umeko, who works as a gal apparel store clerk, is taken in by Eishiro (12 years old), a child actor and model who is rapidly gaining popularity, and unexpectedly finds herself living together with him! "What will happen to my life if I am pushed around by a selfish prince-like boy who is not my type at all?"

(google translated)