Nakahara-kun no Kahogo na Imouto

Nakahara Yuusuke is a thoroughly average high school student, blending seamlessly into the crowd—yet he harbors a deeply guarded secret that could upend his carefully maintained normalcy. That secret is his younger sister, Maria, whose fierce and relentless overprotectiveness has shadowed every aspect of his existence. Determined to escape her smothering vigilance, Yuusuke seized the chance presented by his high school enrollment to move away and live independently, believing that physical distance would finally grant him the peaceful, ordinary life he craved. For an entire year, he savors the quiet liberation of separation, reveling in the simple joys of a life free from Maria's constant scrutiny. But his fleeting respite comes to an abrupt and disheartening end when Maria unexpectedly transfers into the very same high school. With his sanctuary now breached, Yuusuke is thrust back into the whirlwind of his sister's unyielding care, which shows no signs of diminishing. As Maria's overprotective tendencies collide with his desperate bid for autonomy, Yuusuke must navigate a daily minefield of embarrassment and interference, all while trying to preserve the ordinary school experience he fought so hard to obtain.