"Shinkonsan Gokko" centers on the lives of a newlywed couple, Haruto and Miu, as they navigate the challenges and joys of married life. Haruto, a reserved and hardworking salaryman, and Miu, a cheerful and slightly eccentric woman, find themselves adjusting to their new roles as husband and wife. The story unfolds through a series of slice-of-life vignettes that highlight their everyday experiences, from mundane household chores to unexpected comedic situations.

The narrative explores the dynamics of their relationship, emphasizing the contrast between Haruto’s practicality and Miu’s whimsical nature. Miu often introduces playful or unconventional ideas into their daily routines, such as pretending to be different characters or creating imaginative scenarios, which Haruto reluctantly participates in. These interactions serve as a vehicle for humor and character development, showcasing their growing bond and mutual understanding.

Secondary characters, including friends, family, and coworkers, occasionally appear to provide additional context or comedic relief. These interactions further enrich the story by offering glimpses into how Haruto and Miu’s relationship is perceived by others and how they balance their personal lives with external expectations.

The manga’s tone is lighthearted and comedic, with moments of warmth and sincerity. It avoids heavy drama, instead focusing on the small, relatable moments that define a marriage. Through its episodic structure, "Shinkonsan Gokko" captures the essence of domestic life, blending humor with heartfelt observations about love, compromise, and the quirks of living with a partner.