A dead mother, a suddenly reappeared father, and a new stepsister who happens to be an idol. The premise reads like every harem setup ever made, and the OVA knows it. What it does instead is treat the actual emotional wreckage of that situation like it matters, letting awkwardness and grief sit in the same room without trying to turn it into fanservice. One episode means it never overstays the joke, which is exactly when comedy about messy families works best. The real hit is that it finds something genuinely human in what could have been disposable.
Hiroshi's world gets turned upside down when his estranged father shows up at his door with shocking news: he's remarried. His new stepmother is a glamorous actress, and she's brought along a stepdaughter who happens to be Japan's hottest idol. Suddenly, the quiet high school student finds himself sharing a home with Rina Yuuki, whose face plasters every magazine and whose music blares from speakers across the country. The catch is that Rina has no idea her new stepbrother exists, and Hiroshi has to figure out how to keep this arrangement under wraps before it becomes tabloid fodder. Living under the same roof with an idol creates constant opportunities for awkward encounters, misunderstandings, and chaotic moments that threaten exposure at every turn. This OVA leans hard into comedy, using the fish-out-of-water scenario to mine laughs from the collision between Hiroshi's ordinary life and the bizarre circumstances of his suddenly famous family. What starts as an uncomfortable living situation spirals into increasingly ridiculous situations.