High School Girls' Waists

When a beach volleyball player named Saori Kiryuu goes to her coach asking for private training sessions — not because she wants to improve her serve, but because she's embarrassed wearing a swimsuit — the setup goes exactly where you'd expect from there. What makes it a little more interesting than a typical hentai OVA is that Saori's sister, Sawa, ends up watching the whole thing unfold and decides she wants in on the action too. Suddenly the coach is caught between two very determined sisters, and the show leans into that tension across all six episodes. The character designs are detailed and the interpersonal dynamic between the sisters gives it slightly more personality than the average entry in the genre — there's a low-key rivalry there that keeps things from feeling completely one-note. It's a 2013 OVA from Studio Eromatick, adapted from a manga, so expectations should be calibrated accordingly. This isn't a slow-burn drama. If you've watched something like 25-sai no Joshikousei and wanted something with a more straightforward erotic focus and less plot overhead, this fits that space. Fans of the genre who've already worked through the more story-heavy options and just want something that delivers on its premise without a lot of detours will find it does what it sets out to do. Nothing groundbreaking, but it's competent and specific about what it is.