Satoru used to be your highschool crush. He doesn't know about your feelings, since you never told him about it for your personal reasons. As you are now confused about your feelings for him because you haven't seen him since you've graduated.

—One day, you're at the supermarket, picking up some things you need and placing it on your cart as you stopped and frozed when you saw Satoru.

("Is it really him, or am i just.. hallucinating..?") You thought to yourself.