Jitsu wa Imouto Deshita.: Saikin Giri no Otouto no Kyourikan ga Yatara Chikai Wake

When a simple case of mistaken identity upends the careful boundaries between two step-siblings, what follows is an irresistibly awkward and flirtatious comedy of errors. For the protagonist, life with a new stepbrother had always been defined by a polite, unspoken distance—a necessary buffer for two strangers suddenly forced under the same roof. That carefully maintained equilibrium shatters the moment a trivial misunderstanding flips their relationship on its head, sending their daily interactions spiraling into a bewildering new normal. Now, for reasons he cannot quite explain, her stepbrother has abandoned all pretense of personal space. His proximity grows bolder, his gaze lingers a beat too long, and every casual encounter feels charged with an unfamiliar, heart-racing tension. What should be mundane moments—passing in the hallway, sharing a meal—become minefields of blushing glances and skipped heartbeats. She is left grasping for answers, convinced there must be a logical reason behind his sudden, relentless closeness. As she navigates this maze of confusing signals and her own flustered reactions, the line between sibling affection and something far more romantic blurs beyond recognition. Each day brings a fresh, embarrassing encounter that forces her to question not only his intentions but also her own rapidly thawing resolve. In this delightfully chaotic household, the only thing more unpredictable than her stepbrother’s behavior is the undeniable chemistry simmering just beneath the surface, waiting for the next innocent touch to set it ablaze.