Hey 🙂 If anyone can help me find this I'd be really grateful.

So it's set in a school, there's a popular male lead who becomes friends with this scary looking loner who secretly is a character/mascot actor, like a power rangers suit actor. The scary guy becomes more popular through his friendship with the lead, the lead becomes jealous and ruins the friendship until he apologises.

Thanks in advance!

Oko-sama Star by Aomiya Kara

That's the one! Thank you so much 😀