The Invisible Sister (MLB FF) (Adrien/Chat Noir x Oc)

Macy Dupain Cheng was the sister of Marinette. But the thing is that she was pretty invisible. Not literally, but more practically. She wasn't noticed by anyone in her life. Even her parents forget her existence very often. She was very lonely growing up. She went to a different school than Marinette, where she was bullied often and was once almost killed. Since that day she changed.

Macy had a Talent for singing that no one knew of. She secretly hid her identity and is now a world-famous singer, with more money than anyone. She had her own private anything and everything. But she never used them unless it was for something important. She led a simple life with her parents, donating her riches to needy people under the name 'M'. She is now going to start college with her sister, for which she paid for herself since her parents forgot. She will be living in a huge bungalow with another male roommate who she doesn't know yet.
But what happens when she is put in the same house as a model boy and an Alien baby who came out of nowhere with his pet animal.
Watch as Macy goes on a thrilling adventure filled with danger, excitement, and love.
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(in my AU all of this happens in college instead of school. So they go to college instead of school. but the rest of the story is similar to the series)
(all pictures used in the series are not mine)
This is a Daa Daa Daa x Miraculous, series but that doesn't mean you have to know Daa Daa Daa to understand. The theme is mostly around Miraculous so don't worry. Also, the main ship here is Adrien x, Macy, so you have been warned.
There will be cursing in this series. Might be cringy but I am cringy so...