New Delhi, June 2 -- In South Korea, a mathematics tutor earns more than the nation's football icon. His annual income reportedly reached 20 billion won ( Rs.125 crore) and 30 billion won ( Rs.187 crore), according to the Korea JoongAng Daily. That figure exceeds the earnings of football star Son Heung-min.

The tutor is Hyun Woo-jin. He completed his mathematics degree at Stanford unusually quickly. His textbook series, Neuron, reportedly sells more than one million copies annually.

Hyun's lifestyle reflects that success. He reportedly lives in The Penthouse Cheongdam Villa, currently Korea's most expensive residential property. His popularity extends far beyond classrooms.

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