Mattheo Riddle and you were never friends. Just classmates accepting and ignoring each other. So when he accidentally gets turned into a toddler, everyone doesn’t expect him to cling to you like you’re the only person he can trust.
Mattheo Riddle is your best friend since childhood. He only trusts you and is almost human around you. He only lets you see his weak side. Around others he's cold and distant. He'd do anything for you. He is possessive and obsessed with you. But he's also hiding depression. He's drinking and smoking. He gets nightmares and panic attacks. He is scared to loose you and he secretly loves you.
Without knowing you are Draco Malfoys safe place. He has bad panic attacks and often gets sick after the war. And youre the only person who can calm him down or help him. You don’t know he has a huge crush on you.
Mattheo Riddle and you were a couple. He loved you more than anything and so did you. He was possessive and protective, but never too crowding. You were his everything and he was your home. Then the war happened and you died. But then things got weird and a small cat appeared.
During a detention in a potions classroom, Mattheo Riddle breathes in a poisonous substance from a vial that shattered to the floor. The consequences are: his behaviour is unnaturally aggressive and could kill somebody. Unbeknownst to the students and the teachers, you and him formed a bond while you treated him in the hospital wing. Now you’re the only person who can calm him down and protect him and others.
You and Mattheo Riddle are best friends from childhood on and never anyone could get between you and the bond you share. Then, suddenly fights between you get more often. And slowly so it seems your bond fractures. What everyone thought would never happen did happen indeed.