Soon enough, the Teen Titans, along with Mavis and Shadow Mavis, arrived at Titans' Tower. It was pretty late at night, so the Titans decided to at least get some sleep for the night. Robin elected Mavis to sleep wherever she wanted for the night and told her where the blanket and pillows are before heading to sleep. Raven offered to help her sleep, but she declined for now. Beast Boy and Cyborg suggested video games, but she didn't know how to play. And Starfire, well, she just gave her a warm hug. She was too tired to do anything. So the other Titans went to their rooms to sleep, leaving Mavis all alone in their living room to sleep.

Mavis ended up grabbing some blankets and pillows to try and help her sleep, as she lied on the couch and tried to sleep. Unfortunately, thanks to the serum, she had a lot of energy and couldn't go to sleep. She was tossing and turning on the couch until she sat up, fully awake and energized.

"Gah! I can't sleep!" Mavis told herself. That's when out came Shadow Mavis from her shadows. She went and sat right next to her.

"Well if you can't go to sleep, try and find something else to do to help you burn off energy so you can go to sleep." Shadow Mavis explained to her calmly, which did help Mavis calm down a little as well.

"Well, what can I do to help me burn off some energy?" Mavis asked her shadow form, who was looking around and trying to find something to do. Eventually, they both heard a door open. They looked in the direction and saw Cyborg walking out of his room and heading towards the kitchen. Curious, Mavis and Shadow Mavis headed over to Cyborg in hopes that he can help them.

"Hey Cyborg..." Mavis called him out quietly, which caught the attention of the half-robot, half-human hero's attention.

"Oh Mavis, you're still awake." He whispered quietly to her as he pulled out a jug of milk.

"Yeah, and I'm full of energy. I'm trying to find a way to burn some of it off. You got any ideas?" She asked him as he was pouring milk into a pot.

"Simple, head to the gym in Titans Tower. Burn some energy off by working out. But just be quiet about it and not wake up the others." Cyborg explained as he began to boil milk, which confused Mavis at first, but she just shrugged it off.

"Where is that at?" She asked him as Shadow Mavis was standing near a mirror and doing some flexing poses. Mavis saw her and motioned her to come over, which was responded with a sigh before Shadow Mavis went right next to Mavis again. Cyborg points in a direction down the hall and to the left, where the gym was.

"Thank you!" Mavis whispered to him as both her and Shadow Mavis began to head towards the gym in the tower. Meanwhile, Cyborg had a cup of warm milk in his hand that he was drinking.

At the gym, Mavis and Shadow Mavis looked around and saw a bunch of weights and machines to work out with. Only problem was, neither of them knew what to do since Mavis had never worked out before.

"Ummmm... Do you know what to do?" Mavis turned towards Shadow Mavis and asked, which just got a shrug out of her.

"I don't know. I'm just your shadow." She replied back. "But I'm sure we'll figure out along the way."

Mavis nodded and went towards one of the machines, with Shadow Mavis following along.

A few hours later....

Mavis and Shadow Mavis were both looking very tired and sore from the workout. It was their first time working out too, so they basically had no experience with it before. Both of them were a little sweaty too as their body and their veins were slightly red again.

"I....feel....so.....sore...." Mavis said while panting. Shadow Mavis nodded in agreement as she was heavily panting as well.

"L...Let's...go....take a.... shower...and....head....to....sleep..." Shadow Mavis told Mavis. Mavis agreed with her and headed towards the bathroom in the tower to clean her and her shadow up.

(AN: Sorry if this chapter is a little short or plain for you guys. I wanted to get this done as soon as possible and still make it interesting. Anyways, next chapter will feature Tsuyu and Ochaco in it, so don't worry for you MHA fans. Thanks to Omegacrow for giving me the idea to make this! Next chapter will come soon. Till then, Nitro out!)