Kawaii Imouto Kazumi

Rikimaru Okita, a second year in high school, has been living with his so called "little sister" ever since their parents had suddenly abandoned them when he started middle school. So, he works part-time at a nearby cake cafe even when he's the kind of guy that's lazy. Rikimaru Kazumi, Okita's younger sister, is in middle school, and is a kuudere, making a easy life for Okita. But, Okita has been hiding a secret ever since Kazumi was brought to him. A funny romcom story between two siblings and other random friends.