"That's Nishikawaguchi University" is a manga series that centers around the lives of students attending Nishikawaguchi University, a fictional institution known for its diverse student body and vibrant campus culture. The narrative explores the everyday experiences, relationships, and challenges faced by the students, blending humor, drama, and slice-of-life elements.

The story primarily revolves around a group of friends who navigate the complexities of university life. The protagonist, often portrayed as an ordinary student, serves as a lens through which the reader experiences the various facets of campus life. This character is typically surrounded by a cast of distinct personalities, including the academically driven overachiever, the carefree and humorous class clown, the socially awkward but kind-hearted individual, and the enigmatic transfer student with a mysterious past. Together, they form a dynamic group that engages in a range of activities, from attending lectures and participating in club events to dealing with personal struggles and romantic entanglements.

The plot is episodic, with each chapter or arc focusing on specific events or themes, such as exam preparation, cultural festivals, part-time jobs, or interpersonal conflicts. The series often highlights the contrast between the idealized expectations of university life and the reality of its challenges, offering a relatable portrayal of the transition from adolescence to adulthood. Themes of friendship, self-discovery, and perseverance are recurrent, as the characters grow and evolve through their experiences.

Romantic subplots are woven into the narrative, with characters experiencing unrequited love, budding relationships, and the complexities of dating in a university setting. These elements are balanced with comedic moments, often arising from misunderstandings, awkward situations, or the clash of personalities within the group. The series also occasionally delves into more serious topics, such as academic pressure, family expectations, and the uncertainty of future career paths, providing depth to the otherwise lighthearted tone.

The setting of Nishikawaguchi University itself plays a significant role, with its various locations—such as lecture halls, libraries, cafeterias, and dormitories—serving as backdrops for key moments in the story. The university's clubs and extracurricular activities are frequently featured, showcasing the characters' passions and hobbies, whether it be sports, music, or cultural pursuits.

Overall, "That's Nishikawaguchi University" offers a multifaceted portrayal of university life, capturing both its joys and struggles through a diverse and engaging cast of characters. The series balances humor and drama, making it an accessible and relatable read for audiences familiar with the challenges and triumphs of young adulthood.