In Lesson in Loyalty, at 25 years old, Kurt, a teacher, faces hurdles in advancing toward his goals. He works as a private tutor to make ends meet and compensate for his stalled plans. Additionally, he takes on a part-time position as a fitness instructor at a gym. Working under a brokerage company connecting teachers and parents, Kurt diligently strives to meet his managers' expectations. Despite his efforts, Kurt often goes unnoticed within the company. However, his path takes an unexpected turn when he reunites with an old friend, marking the beginning of a new chapter in his life. Kurt gains popularity within the company with his friend's referrals, earning praise from parents and managers. He navigates to maintain relationships with new parents and faces off against a competitive colleague who doubles as his gym rival. Amidst life's uncertainties and betrayals, Kurt seeks to find balance.