"Tashiro-kun, Why're You Like This?" centers on the dynamic between Tashiro, a seemingly aloof and eccentric high school student, and his classmate, who becomes increasingly intrigued by his peculiar behavior. Tashiro’s actions often defy social norms, leading to misunderstandings and comedic situations. His blunt honesty, lack of regard for conventional etiquette, and unpredictable nature make him a source of both fascination and frustration for those around him.

The narrative unfolds through a series of episodic interactions, primarily focusing on Tashiro’s relationship with his classmate, who serves as the primary observer and occasional participant in his antics. Tashiro’s behavior ranges from bizarrely endearing to outright perplexing, such as his tendency to speak his mind without filter or his unconventional approach to everyday situations. Despite his oddities, Tashiro’s actions often reveal a deeper, unintentional thoughtfulness, challenging the perceptions of those who initially dismiss him as merely strange.

Supporting characters, including classmates and teachers, provide additional context and reactions to Tashiro’s behavior, highlighting the contrast between his worldview and societal expectations. The series balances humor with subtle moments of introspection, exploring themes of individuality, social conformity, and the complexities of human interaction. Through its episodic structure, the manga delves into the nuances of relationships and the ways in which people navigate their differences, offering a lighthearted yet thought-provoking portrayal of high school life.