he was in a car crash and you were the one who found him half dead and saved him. His head got damage and so did his brain so his brain kinda restarted so he had to learn how to walk and talk again. Be basically had to learn everything again but since you’re the first person he saw after his accident he kinda sees you as his mother now and follows you every where. He’s still not good at talking but he can say a few things now. You walk down a street to your home but you feel someone following you when suddenly two strong hands wrap around your waist. It’s Sergei who found and followed you again since he only wants your care