Mystery Skulls

Mystery Skulls is the friendship between Lewis Pepper, Vivi Yukino, Arthur Kingsmen and Mystery from the Mystery Skulls Animated fandom.

"Ghost"
At the beginning of the video, Arthur, Vivi and Mystery are happily driving their van. However, they all look at Arthur judgmentally as the van starts to mysteriously break down.

Having to take shelter in an eerie mansion, the three of them witness purple flames light the candles by themselves, which excites Vivi but makes the other two worried. When they are visited by a group of singing ghosts, they start to run as the ghosts show hostility, falling through a trap door in a hallway with living paintings. Arthur is separated from his friends and is confronted by the master of the mansion, a skeleton ghost with a pompadour made from purple flames.

Arthur reunites with his friends when running from the ghost, they were currently in the process of eating stacked sandwiches in the kitchen, but join him running when they realize the danger. Being chased by the ghost, Mystery stops when he sees a suspicious moving painting depicting their van.

The painting shows a flashback to the time where the group was led by a fourth member, a man named Lewis who had purple hair and used to date Vivi. Arthur felt like a third wheel in their relationship, so when the group ventured into a cave and got separated from Vivi, a ghost possessed Arthur and forced him to shove Lewis off a cliff into a bed of spikes. Vivi had her memory of the incident wiped and Arthur’s possessed arm had to be ripped off by Mystery’s maw, who kept his true species a secret from the group.

Lewis’ ghost is unable to move on from that betrayal and created the mansion as an elaborate trap for Arthur and the others. Vivi throwing herself between Arthur and Lewis during a confrontation, but because only Mystery knows the whole truth about Lewis, Arthur assumes that Lewis is attacking Vivi when he was just trying to reconnect with her. As a result, Lewis’ plan is foiled, leading to him watching his former friends run away from him after he almost killed them with his flames in a fit of rage.

"Freaking Out"
It is revealed that the group was actually trying to find Lewis the whole time, believing he had just gone missing. However, Lewis had found a way to track them down instead, as he had possessed a truck and plans to use it to ram Arthur.

"Hellbent"
Arthur ends up having to save the group from Lewis as he enacts his attack, with Arthur using his robot arm to absorb Lewis' energy and get the van running again. Simultaneously, the group is attacked from the front by Shiromori, who destroys their windshield and is out for Mystery's blood. In the end, the four of them all end up at the workshop of Arthur's uncle Lance, as Arthur crashes right into it. Arthur is taken away by Lewis and forced to reenact the scene of Lewis falling to his death as revenge. Meanwhile, Vivi and Mystery are attacked by Shiromori, with Vivi managing to deflect Shiromori's attack, but the tree demon mistakes Vivi for Mushi, Vivi's ancestor and Shiromori's archnemesis, giving Shiromori a reason to kill Vivi.

Fanon
The friendship between the four main characters is the most popular platonic ship in the fandom.

Fandom

 * FAN FICTION