Oniichan dakedo Ai sae Areba Kankeinai yo ne!

Prepare for a delightfully chaotic dive into the complexities of sibling affection, where the boundaries of family love are constantly tested and hilariously redefined. This series centers on a high school student whose ordinary life takes an extraordinary turn when his long-lost twin sister suddenly reappears, ready to re-enter his world with an intensity that promises to shake things up considerably. As their reunion unfolds, the siblings navigate the awkward and often uproarious challenges of living under the same roof once more. With a blend of innocent charm and surprisingly bold declarations, the sister's unwavering devotion to her brother creates a whirlwind of comedic misunderstandings and heartwarming moments, proving that when it comes to love, sometimes the heart simply knows no bounds.

✦ AI-drafted summary