Sex Is No Laughing Matter (2008)

Nineteen-year-old college student Mirume finds himself captivated by Yuri, a nearly forty-year-old art instructor known for her eccentric humor and unpredictable nature. Their dynamic shifts dramatically when Yuri invites Mirume to her studio, where she flirtatiously initiates a romantic connection with the innocent young man. Complications arise when Mirume learns that Yuri is married to a much older spouse, forcing him to navigate the complexities of love and fidelity in a world that blurs the lines between teacher and student.