This one gets you in about thirty minutes flat, which is exactly the cruelty of it. Kusuko does the thing every guarded person does: she watches Mishima cycle through girls, decides she's above wanting him, and calls that self-respect instead of fear. Then he actually calls her out for being cold, and the whole armor turns out to be tissue paper. The genius is that dating him doesn't fix anything. Every good day makes the drop farther, until she's standing there listening to him on the phone with another girl and doing the math she'd been avoiding since the first frame. A single-episode OVA from 1993 with no room for subplots, no ensemble to hide behind, just one girl finding out that falling harder and trusting more are not the same thing.
Kusuko watches from the sidelines as Mishima, the class playboy, cycles through one girlfriend after another. She has a secret crush on him but keeps her distance. Mishima reads her reserve as coldness and confronts her about it. They work through the misunderstanding and start dating, and the better she knows him, the harder she falls. But romance in high school rarely stays simple, and one day she overhears him on the phone with another girl. The result is a single-episode romance OVA about a crush that turns complicated.