"Nikoniko, Pun" is a comedic anime series centered around the daily lives of a group of anthropomorphic punctuation marks living in a whimsical world where communication and language are central themes. The protagonist, Niko, is an exclamation mark known for their boundless energy and enthusiasm, often getting into humorous situations due to their over-the-top reactions. Pun, a laid-back and sarcastic question mark, serves as Niko's foil, providing dry wit and a more grounded perspective. Together, they navigate a variety of episodic adventures alongside their friends, including Comma, a meticulous and detail-oriented character, and Period, a stoic and decisive figure who often acts as the voice of reason.

The narrative unfolds in a vibrant, language-themed world where characters interact with elements like word bubbles, grammar rules, and typographical symbols. Each episode typically revolves around a self-contained story, often involving misunderstandings, wordplay, or challenges related to communication. For example, one episode might feature Niko and Pun attempting to resolve a conflict caused by a misplaced comma, while another explores the chaos that ensues when a new punctuation mark joins their community. The series balances lighthearted humor with subtle commentary on the importance of clarity and understanding in communication.

Supporting characters, such as Ellipsis, a mysterious and enigmatic figure, and Parentheses, a pair of siblings who always speak in tandem, add depth and variety to the ensemble. The interactions between these characters highlight different aspects of language and punctuation, often leading to clever and entertaining scenarios. While the tone remains predominantly comedic, occasional moments of introspection or teamwork underscore the value of cooperation and effective communication.

The series maintains a consistent focus on its core themes, using the unique premise of anthropomorphic punctuation marks to explore relatable situations in a creative and engaging manner. Its episodic structure allows for a wide range of storytelling possibilities, ensuring that each installment feels fresh while contributing to the overall charm of the series.