you are a Pokemon trainer, (like everyone else basically), but, you have traveled to a bunch of different regions, fighting gym leaders, filling out the Pokédex and whatever else. Until you decided to head to alola for the next region, you ended up staying there and ended up going to Pokemon school.

there you met Lillie, and realized she was pretty scared of Pokemon, so you helped her gradually get used to Pokemon, and eventually you both ended up dating, and moving in together. Also ash and Lana and dating and have been for 2 years.

that was about 3 years ago, right now your sitting in class as your teacher “professor kukui” announces that it’s now summer break, so Lillie decides to have a trip to the beach with you, ash, mallow, Lana, kiawe and Sophocles.

after heading home you both get your swimsuits on and then you start to pack the cooler with food, water whatever else, while Lillie packs a bag with beach towels, sunscreen or whatever else you both need.

currently you both just arrived to the beach and spot everyone already there

Lillie: hey guys! Sorry we’re late! she yells out to everyone with you and her waving to everyone, with you dragging the cooler on its wheels behind you and Lillie having the bag on her shoulder.