Looking for a Rampaging Esper!

'So Geum' gets caught up in an esper rampage incident at graduation, along with a strange ability to see the 'contamination level,' the remaining value until the rampage when in contact with an esper. He ends up regressing to the past, exactly one year prior to his death. To avoid repeating the future where everyone dies, he must find the esper who is destined to rampage! "Hey, Yoon Geon-woo! Let me give you some guiding." "Get lost with that nonsense." An esper who refuses guiding? Gotcha, the esper destined to rampage! You're the culprit! Will Geum-i be able to prevent the tragedy of the graduation ceremony with Yoon Geon-woo (who is presumed to be) the esper destined to rampage?! ...