Your Blue World

"Seo Jae-ha, a concubine's son striving to become the successor of his family, becomes a debtor to Yu-jin—a former classmate whose face he barely remembers—after a failed investment. Under the condition of becoming a sexual partner, Jae-ha finds himself toyed with by him. However, through a chance encounter, Jae-ha time-slips back to his high school days. To escape this fate, he begins to treat Yu-jin with kindness... Will Jae-ha be able to overcome this situation and ascend to the position of successor? A second-generation chaebol protagonist, who sought only success and looked down upon human affection, realizes true love with a man who was once his ill-fated enemy in the past."