The grave at the end is someone close to her whom both made a bucket list together. But that other person could not come with her to do the list (maybe too sick?) She then went on this road trip to fulfill the bucket list for both of them. 1st is FISH - she jumped into the pool that has a no diving sign and swam . 2nd is DOG - she sprayed the hotdog man perhaps that man wronged her close person whom wanted a bit of revenge? That's when she bumped into Dean and the whole Starlight MV happened. She left him with her necklace as a momento. 3rd is SLIDE - which Dean taugh her skateboard a little and then she learned more by herself. 4th is BUBBLE - so she made a mess of bubbles and played with it. 5th is WIND - she played with the sparkling lights and colored smoke flares while watching the wind blowing on the smoke trails. Finally she finished the bucket list and returned home to M74 Rd by the beach. She played with the puzzle box left behind by her loved one and found the "MISS ME" note. The style of note seems feminine so it maybe a female wrote this for her to find. So the "M74 MISS ME" beeper message in Starlight was sent by that woman (Mother/close girlfriend) to check on her? You see her face change to a more serious look when recieved that message. Luckily Her conversation at the payphone was not serious so she hang out with Dean more. But she reluctantly left Dean in Starlight later because she has to keep that bucket list promise. By the time she completed her bucket list, her love one died already. So she lay down all her photos she made during her bucket list trip and left all her worries at the grave. She can now moves on with her life feeling satisfied for a kept promise and remembrance of a loved one.