Unexpected Love (KimMacau)

Months passed after the war. The Major and Minor Families had grown close, working together harmoniously. Everyone was content, except for Kim, the youngest son of the Major Family. He deeply regretted pushing Chay away and longed to have him back. However, Chay kept his distance, leaving Kim at a loss. Not knowing how to win Chay back, he turned to Macau for help. Macau, who had become best friends with Chay, agreed to assist him. As they collaborated to mend the rift between Kim and Chay, they found themselves growing closer, their emotions evolving, and both of them succumbing to the allure of something that seemed so forbidden.

The characters are from KinnPorsche the series by Daemi. It's fanfiction and not a translation.