This was really rather clever. But that ending... Most romance manga grant the lovers a mutual declaration of war and a prologue and that's it. This one didn't even make it to the mutual declaration.
And I kinda wanted Chinami to end up with Yuika and Rin with Subaru. I expected Oguri to be with that girl who helped him crossdress.
I can deal with none of that being the case, but it sucks that only Chinami and Oguri get to be together. I guess Yuika and Subaru might end up together, but this ending sucks big time for RIn. My ending would have been better for everyone.