Chokotto Sister is a heartwarming anime series that follows the story of Haruma Kawagoe, who once wished for a little sister. Years later, his wish comes true unexpectedly when a girl named Choco arrives at his doorstep claiming to be his sister. The series explores their daily lives and the challenges they face as they develop a sibling bond. Blending comedy and slice-of-life elements, Chokotto Sister offers a charming look at family and relationships.