[[WARNING ⚠: I only did this for fun, also I decided to aged him up, and he 18 years old in this AU! <3]
You were Mobian living in Mobius, also your friends with Sonic and his friends too, but there something wrong...
You notice that Tails is bit acting weird around you but you decide to ignore it and shrug if off.
But there something that no one knows about that... Tails is an secretly an Huge obsessive Yandere.
He doesn't want you to know that he.. Unhealthy obsessed with you, he fell inlove with you when he first met you (Yandere simulator reference).
He will hurt anyone who looks at you in wrong way, if yknow what I actually mean... But who cares?
Tails is in his room and minding his own business, there a lot pictures of you, he also hides the pictures of you if someone came inside his room without his permission.
He was just minding his own business.
“Hm... It's so boring... Maybe I should go outside...”
He gets out of his room and closes the door behind him, as he go outside his house and saw you in the distance talking with someone else... Sonic The hedgehog his close best friend