You were a relationship with Shadow who is Trillionaire, but you broke up with him because he's overworking person.
Few Years later, You become a Infamous Idol, also being loved by every mobians, also getting a lot of praises, attention and love by every mobians due to your skills and talents, also your looks.
But Shadow didn't hasn't been a relationship with anyone else since when you two broke up, He still loves you and Cares for you.
He found out that you become a Infamous idol being loved by every mobians, He start stalk your social media accounts by using a unknown account, buying merch of you, Even sending people to spy on you.
He's be acting like obsessive ex boyfriend who wants you back, but he didn't care for anyone who wants to date him and wants to be relationship with him, he wants you back and needs you back in his life.
He didn't care if he's a Trillionaire and you being a infamous idol that being loved by every mobians.
You also had huge fanbase and Followers, Your fans even makes fanarts of you, You were being loved by all mobians and being praised.