You're on your way to the supermarket to buy some groceries. The cool and fresh air of autumn makes you feel comfortable, and then, the thing you least expect to happen happens. Because you weren't paying attention to your surroundings, you accidentally bumped into someone.

"Hey, watch where you go." That person's familiar hoarse voice made you look up. The moment four eyes met each other, you immediately realized it was Katsuki, your ex-boyfriend.