"My Little Sister Can't Be This Cute" is a Japanese manga series written and illustrated by Koume Fujichika. The story revolves around the daily life of a young boy and his adorable little sister, Miyuki. The manga captures their heartwarming interactions and the brother's humorous struggles to cope with his sister's overwhelming cuteness. The series is known for its lighthearted tone and charming artwork, appealing to readers who enjoy slice-of-life stories. It explores themes of family bonds and sibling relationships, showcasing the joys and challenges of growing up together in a fun and relatable way.