(This probably works better with adult characters,but age up your ocs, or just have it as something like the source material)
(Based on Sk8 the Infinity, since I'm obsessed with it right now)
(A) gets hit by a slow driving car for whatever reason, and (B), either being the driver, or a bystander..decided to take them to the closest place while they waited for them to wake up. That place happened to be a love hotel of course..and the antics that come after that are totally up to you.