"Naughty But Nice" is a romantic comedy manga that centers on the evolving relationship between two contrasting characters, Riku and Mio. Riku is a carefree, mischievous high school student known for his playful antics and tendency to tease others, particularly Mio, a diligent and reserved classmate. Despite their differences, the two are drawn together through a series of humorous and heartfelt situations, often stemming from Riku's attempts to break Mio out of her shell.

The narrative explores their dynamic as Riku's persistent teasing gradually reveals a deeper affection for Mio, while Mio struggles to reconcile her growing feelings for Riku with her desire to maintain her composed demeanor. Their interactions are marked by comedic misunderstandings, lighthearted pranks, and moments of vulnerability, creating a balance between humor and emotional depth. Supporting characters, such as Riku's equally mischievous friends and Mio's more outgoing classmates, add layers to the story by influencing the main duo's relationship and providing additional comedic or dramatic tension.

As the story progresses, Riku and Mio navigate the complexities of their feelings, with Riku's playful nature often clashing with Mio's more serious outlook. The manga delves into themes of self-discovery, the challenges of communication, and the transformative power of relationships. Through its blend of humor and romance, "Naughty But Nice" captures the awkward yet endearing journey of two individuals learning to understand and appreciate each other's differences.