Beneath The Skatepark Light's, chapter 1.

Marceline, traveling from Japan to Canada, has an eventful encounter at the airport where a skater named Ria accidentally takes her apple. The two quickly bond, and Ria offers to teach Marceline how to skateboard. They meet up at a skate shop and later at a skate park, where Ria begins teaching Marceline the basics. As they grow closer, Ria invites Marceline to an underground skate race called Rampage Roller Rumble. They spend the night together, and early the next morning, they go skateboarding around Toronto. Despite a minor accident that brings them physically closer, Ria suddenly leaves, feeling overwhelmed by her emotions.