They didn't This is a special, like the new year's chapter ^^ It's a gifth form Djun to the fans Djun (the creator) says that this can or not happen in the future
I waited for 48 episodes so that I will see the look on Alex's eyes when he'll be rejected Edit: I'll probably be happy for them if they will end up together though (this part was deleted for some reason) (=・ω・=)
When the vampire will get out of the water he’ll probably be so wrinkled