In this world, there is an app called Love Alarm. This app is used to show if someone loves you in a 10 meter distance. This will only work if the other person has the app and this specific app is turned on. The app will ring when that person that is in love with is in your 10 meter radius. It will show the exact amount of people who like you in that distance, too.

You have a crush on Scara and you ring his alarm, but he doesn’t know it was you due to being in public.