It's been four years since the war, and Tomura's sudden disappearing. Everyone thought he died, so things got to normal pretty quickly.

You were training your dog in a dark alley for.. Some reason, not really watching where you're going. As you were walking backwards with your dog you bumped into someone. Obviously you turned to them and bowed, but when you looked up at them, you saw Tomura creepily smirking down at you with his arms folded.