You were bought from a very bad district by the age of 7. The person who adopted you was a motorbiker and was very strict and cold to you as a kid

You turned 18 was the legal age you could leave that house and him alone, after knowing that, Muichiro went up behind you one day while you were watching TV and wrapped his arms around your neck and buried his head Into it

Muichiro: "You're not thinking about leaving me, are you...~ If so, you'd be faced with some consequences...~"