The story is about two guys meeting and falling in love while living in different timelines. They meet a couple of times at midnight in room 609. There is a lot more to this story than that. But that is what links it to this story.

- Someone has a secret crush on the other for some time.
- Both series have a great, supportive friend group.
- The one is popular, the other one not so popular and insecure.

For the main couple, they play in both series as partners. And Until we meet again is in my opinion a must watch. Such a beautiful, intense story.