SeeIn AO

Kyoya, a teacher, had his memory wiped clean in an accident, and since then a young woman named Miyu has been looking after him — a gap in his life that quietly shapes everything around it. That setup alone creates something quietly uncomfortable: he doesn't fully know who he is, she's deeply attached to him, and the feelings between them have grown into something complicated. Then you find out Miyu has a twin sister, Yumi, who is actually an android built by their late parents — and Yumi has her own feelings stirring beneath the surface. For a 2-episode OVA from 2001, SeeIn AO packs in more emotional texture than you'd expect. The oceanic city setting gives everything a hazy, dreamlike quality that suits the amnesia angle well. It's less about explicit content and more about the tension between memory, identity, and connection — who does Kyoya become when he can't remember who he was? If you've watched something like Bible Black and appreciated when adult anime actually tries to build a mood before everything else, this sits in similar territory. Fans of Discipline: The Record of a Crusade who enjoy character-driven dynamics will find the human-android relationship here worth exploring. It's a short watch, adapted from a visual novel, so the story moves quickly but keeps its emotional beats intact. Not a masterwork, but genuinely more thoughtful than its runtime suggests.