Hello, thank you so much for playing our game! We're glad you enjoyed your time <3
SPOILERS:
The first ending, the "friendly" ending, stops at the park a few days before Christmas Eve. It leaves the player with a hopeful feeling for the future. The second ending however will take place on Christmas Eve. So, if you see the title card with December 24, that means you've definitely gotten this ending! There's a new CG to unlock and a sweet moment between Elliot and Noel.
I'm aware it's a little difficult to get the true love ending so if you'd like a walkthrough, I'm happy to type one up for you. Thank you again!