Chat POV
One lovely evening the Parisian superhero, Chat Noir was flying across Paris on his weekly night patrol. He was making his way over to the Dupain-Chang bakery for his weekly visit to Marinette's balcony. I wonder what my Princess is doing... he thought. He made his way to Marinette's balcony and was about to knock on her window but he stopped because of what he saw.

Marinette POV
"Tikki.... does this look ok?" Marinette said as she was looking in the mirror seeing if her Sailor Moon cosplay outfit looked ok on her. (Just to make sure you know, Chat can not see Tikki because she is Not in the way of the window, and Chat can't hear them either) "Yes Mari! It looks fine! But I think you should but on the other wig..." "yeah ok! Let me take a shower then I will put everything else back on." Marinette walked into the bathroom and took off her cosplay outfit and put a towel on then walked out of her bathroom to her closet and picked up some pajamas and then placed her cosplay outfit on her bed. She walked back into the bathroom followed by Tikki and started to take a shower.

Chat POV
NO WAY! SHE WATCHES SAILOR MOON TOO?!!! Chat thought. A few minutes passed while he was waiting for her and then he saw that she was going to take a shower, so he took that time to go in and wait for her on her bed. Chat opened the window and went in and sat on the bed. After a few minutes passed he was staring at the Sailor moon cosplay and couldn't help but try it on. He looked at the tag and weirdly he was the same size as Marinette. So he tried it on. He got the blonde wig on and the dress and all of the accessories. (Also Marinette had two wigs one her hair color and one that was blonde, both in the sailor moon hairstyle)

Marinette POV
I got out of the shower and put my pajama's on. I walk out of my bathroom to see the one and only Chat Noir standing in my room with my cosplay outfit on..... "WHAT THE HELL CHAT?!!! GET OUT OF MY ROOM NOW!!!" I said looking at him really confused. "Oh Princess your here!" "Well obviously.... this is my room.... anyways.... WHY ARE YOU IN MY ROOM WITH MY SAILOR MOON COSPLAY ON?!!!" "Well I was on my weekly patrol and I was making my way over here to see how you were doing and you had this on so I wanted to try it on..... BY THE WAY I LOVE SAILOR MOON!!!!!!" "Oh...... WELL TAKE IT OFF AND GET OUT CHAT!"

Chat POV
Marinette pushes me in her bathroom and tells me to take off the cosplay outfit. I took it off and went back out into her room. "CHAT, GET OUT!" "But Princess I wanted to talk!!!" "Chaton, I need privacy so I can get my Halloween costume together..." "Fine..." I said sadly. She pushed me towards the window and said "Au Revoir Chaton!" "Au Revoir Princess!" I said taking off into the night.

^^ that's how Chat would have looked, just with a mask on.

How did you like my first one shot? I have been thinking about this for a long time😂😂 but I just haven't gotten the time to do anything with it. What would you like me to do next?