Baka Deka Imōto ga Yatte Kuru!

For five long years, Kasuka Nagasu has lived apart from his younger sister, Kujira, ever since their parents were transferred overseas for work. Today, at last, the siblings are finally set to reunite. In Kasuka's mind, Kujira remains exactly as he left her—a tiny, precious girl just two years his junior, still small enough to fit neatly into his cherished childhood memories. As he waits for her arrival, Kasuka hears Kujira's voice calling out his name, and he can't help wondering how much she might have changed during their time apart. Perhaps she'd gained a little height, he reasons—nothing too dramatic. But when she finally appears, his expectations are utterly obliterated. His little sister has grown to an absolutely staggering size, her enormous frame shattering every mental image he had clung to. Most shocking of all, she casually swings her massive rolling suitcase around as though it were nothing more than a lightweight handbag. Kasuka's quiet anticipation instantly collapses into wide-eyed disbelief—and so begins a wildly outrageous sibling comedy, chronicling the chaotic daily misadventures of an ordinary older brother and the impossibly, enormously grown little sister who has returned home to upend his life.