Driving an Excavator Was Regarded as a Tomb Robber

He graduated from the Department of History, but drove an excavator at a construction site. He accidentally dug up an ancient tomb and suddenly started robbing the tomb out of greed... His peaceful life was in turmoil because of an ancient tomb ring. He participated in the "Happy Boys" singing competition under the threat of another gang. He failed to win the championship, causing heavy losses to the powerful people who supported him and was hunted down... He disguised himself as a woman and participated in "Happy Girls" and won the championship. However, his identity was exposed and he has been there ever since...