I'm Jeremie, I'm late for school and I'm running out of time, I run and I saw an old man who was about to get crashed, I saved him and he gave me a ring?

I wonder what could this be..? He took it out, and a kwami came out from the ring (he called himself a spirit, named plag)

(Kwamis)Plag:hey there, I'm your Guardian, say plag claws out, to transform

You were shocked but you didn't have time to chat and just hid the ring and head to school, you bumped into me