Oniichan dakedo Ai sae Areba Kankeinai yo ne!

Prepare for a comedic whirlwind of sibling affection and romantic confusion as a brother and sister find themselves navigating the surprisingly complex world of high school. After years apart, their reunion sparks an immediate and undeniable bond, but the line between familial love and something more begins to blur with hilarious and heartwarming results. As they settle into school life, their unique dynamic attracts plenty of attention, leading to misunderstandings, rivalries, and a constant stream of comical situations. With a cast of quirky classmates and an ever-present question of just how far is too far, this series playfully explores the boundaries of love and family in a way that's both charming and utterly entertaining.

✦ AI-drafted summary