All the connections apparently...
I feel like I'm going to have start this one over at some point if it keeps expanding the number of potential ladies. A few have gotten definitively ruled but there's still enough they are kind of running together.
Part of me kind of hopes nothing happened and it was his guy friend who dumped him at the hotel and he's keeping his mouth shut in the hopes of giving Nao the motivation to start dating again.
The other part really wants it to be the gal friend from college and she's still a bit too hesitant to say how she really feels.
Putting up the option that it could be the bride. They were an item before, and he seems to still have some lingering feelings towards her.
The option that nothing happened is also high for me. All we know is that he woke up in a love hotel; doesn't necessarily mean he did some McLovin' in it. With the whole web of events and the journey to find out what happens, either he thinks it doesn't matter if he didn't sleep with the person but he's found his soul mate; or nothing happens, which is also possible.
Dude's a romanticist to a fault, despite having charisma to connect to soo many girls.