Here's a thing, don't need anything for Reika, for her Kaoru is just a "#1 fan" and she doesn't look like have any feelings for him right now and is using him just to get to know Chiaki.
That's easy, got to crossdress at home, so change before entering and back at school. Thought after 10 years, things won't be easy...
Something is off about this "guy"...
Classic "boyfriend jacket"... smooth...