Onii-chan Zurui

The anime centers on the sibling rivalry between a younger brother and his older brother. The younger brother harbors resentment towards his older sibling, perceiving him as unfair due to his actions like taking toys and controlling the television. Driven by this frustration, the younger brother devises a plan to overcome his brother's perceived dominance. He believes that by growing larger and stronger, he can level the playing field. This leads him to a drastic change in his eating habits, as he begins to consume vast quantities of food in an attempt to trigger a significant growth spurt and ultimately become the bigger brother. The series explores themes of sibling dynamics, jealousy, and the lengths one will go to for perceived fairness.