Uchi No Otouto Maji De Dekain Dakedo Mi Ni Kona Fix [better]

The story primarily focuses on the relationship between the protagonist and his little sister. Despite her young age, the sister is incredibly intelligent and resourceful, often finding creative solutions to complex problems. However, her methods can be unorthodox, leading to humorous and sometimes chaotic situations. The series explores their interactions, the protagonist's reactions to his sister's antics, and how they influence each other's lives.