D-Spray

What happens when a mysterious spray starts affecting everyone around it? That's the central hook of D-Spray, a single-episode OVA from 2013 adapted from an erotic visual novel by Undermoon. The studio Schoolzone handled the adaptation, keeping things compact and self-contained at just one episode, which means there's no slow build or multi-arc commitment here. You get in, the premise does its thing, and it wraps up. For fans of short-form adult anime adapted from visual novels, that low time investment is genuinely part of the appeal. If you've watched something like Discipline or similar VN-based OVAs from that era and enjoyed the straightforward format, this sits comfortably in that same space. It's not trying to be a deep character study or a slow-burn romance — it's a quick, focused piece that plays its premise fairly directly. The visual novel source material gives it a bit more structure than a purely original production might have, since there's an existing story and character foundation to draw from. If you tend to enjoy adult anime that comes from game adaptations rather than original scripts, that lineage is worth knowing going in. It's a niche recommendation, but for what it is — a single-episode hentai OVA with a specific gimmick premise — it delivers exactly what the format promises without overstaying its welcome.