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To pass as a male transfer student, Nagisa Kiryu cuts her hair, binds her chest, and walks into a Japanese high school. She's not there for class — her cousin Yoshiyuki disappeared after being bullied, and nobody seems to care enough to find out what actually happened to him. So she's doing it herself, from the inside. The setup is genuinely compelling: a girl navigating male social spaces, building trust with people who might be connected to her cousin's vanishing, and trying not to blow her cover while piecing together what went wrong. Characters like Aiki Hiragi and Shiori Hiura complicate things in ways that keep the story from feeling straightforward. To be clear about what this is — it's a 2-episode hentai OVA adapted from an adult visual novel by Guilty eX, so the explicit content is front and center. But the investigative framing gives it more structure than you'd typically expect from the genre. If you've watched something like Kite or Bible Black and appreciated that they at least tried to wrap adult content around an actual narrative, this sits in similar territory. It's not reinventing anything, but the gender-disguise mystery angle adds a layer that makes the story feel like it has somewhere to go rather than just existing to connect scenes together.