"Rito's Harem" is a popular manga and anime series centered around Rito Yuuki, a high school student who finds himself surrounded by various female characters who are romantically interested in him. The story blends elements of comedy, romance, and fantasy, as Rito navigates his relationships with these girls while dealing with his own feelings and insecurities. The series features a diverse cast, including Lala Satalin Deviluke, an alien princess who initially confesses her love to Rito, and other characters like Haruna Sairenji and Mikan Yuuki. The harem dynamic creates humorous situations and misunderstandings, making it a lighthearted exploration of teenage love and friendship.