Outside class hours, Kim Kyung-wook delivers meals on foot to apartment blocks near his university in eastern Seoul, while constantly checking his phone to trade stocks, cryptocurrency and used Nike sneakers.
That probably won't help him land a well-paid job when he graduates later this year, but Kim says such side hustles are a "smarter thing to do" in the face of increasingly bleak job opportunities and an expanding income gap under President Moon Jae-in.
Kim is one face of a lost generation that many see emerging as the key voting bloc that could swing next year's presidential election. Already, he and voters like him helped the main opposition party triumph in April by-elections for mayor of Seoul.