Takagi's mask slips just enough to show you why Nishikata keeps falling for her, then she pulls it right back. The OVA doesn't need to go anywhere, it exists to let you sit in the warmth of their dynamic at a water park, watching her win every stupid game while somehow making you believe she's doing it because she wants his attention. It's filler that understands filler's real job: reminding you why you showed up in the first place.
Nishikata and Takagi spend a summer day at a water park, where the usual power dynamic between them shifts in unexpected ways. Takagi's teasing takes on a new dimension when they're both soaking wet and trying to navigate the park's attractions, but Nishikata finds himself caught between wanting to get back at her and simply wanting to enjoy the moment together. The water slide becomes the perfect setup for their playful banter, as Nishikata schemes to finally turn the tables on his relentless tormentor. What starts as another chance for Takagi to toy with him evolves into something sweeter, revealing the comfortable intimacy underneath all their back-and-forth. The casual summer setting strips away any pretense, leaving just two people who genuinely enjoy each other's company despite all the verbal sparring. It's a lighthearted reminder that their teasing is really just another language for affection.