My Engineer follows the story of Bohn, a popular and handsome engineering student who decides to get revenge on Duen, a kind-hearted medical student, by making him buy him a flower every day for a month. As the days pass, their relationship evolves from a prank into a genuine connection, forcing them to navigate the complexities of university life, social expectations, and their growing feelings for one another. Beyond the central romance, the series explores the interconnected lives of several other couples within the engineering faculty. Each pair faces unique challenges, ranging from misunderstandings and past traumas to the struggle of balancing academic pressure with personal relationships. The show highlights themes of friendship, loyalty, and the transformative power of love during the formative years of college.