The Rings of Love
In a world like ours, it's all the the same except High School. In this High School, you claim with rings. If you like someone, or think they're cute, you put a ring on their finger. And at the beginning of the year, you are assigned a specific color of your ring that no one else has in the entire school. Then, when you put the ring on their finger, it has the color you have, then the gem on the ring changes based on the mood you feel for that person. However, if you don't like them anymore, the gem then shatters, and the ring then returns to the rightful owner's pouch.