Neoui Pureun Segye

Seo Jae-Ha, the illegitimate son of a wealthy family, aspires to become the heir to his family. After a failed investment, he becomes a debtor, betraying his former classmate, a stranger named Yu-Jin, by offering him a sexual partner. He is then manipulated into becoming a debtor. A chance encounter transports him back to his high school days. To escape this predicament, he begins to treat Yu-Jin kindly. Will Jae-Ha be able to overcome this predicament and ascend to the throne? The protagonist, a second-generation chaebol who has always sought success and disregarded human connection, discovers true love with a man with whom he had a bitter past.

(Source: Lezhin, translated)