Based on Mitsuba and Ichijinsha's 30-sai no Hoken Taiiku (Health and Physical Education for 30-Year-Olds) guidebook. The guide is aimed at men in their 30s who have not experienced romance or sex with women yet. Imagawa Hayao is a 30-year-old virgin bachelor. One day, a cupid descends from heaven with the express purpose of forcing him to graduate from virginity. Thus unfolds a pure love story between a 30-year-old bachelor and a 30-year-old bachelorette. (Source: AniDB)

Takashi Natsume and his spirit companion Madara, nicknamed Nyanko, continue returning the names of spirits from the Book of Friends given by his late grandmother Reiko Natsume. On his way back from school one day, Takashi encounters a lurking spirit named Monmonbou, who recalls memories of Takashi's grandmother after hearing his name. Takashi's natural curiosity leads him to explore a mysterious town where his grandmother used to live. Befriending her old acquaintance Yorie Tsumura and Yorie's son Mukuo, Takashi unveils more of his grandmother's past. In the meantime, Nyanko detours for food and stumbles upon a suspicious Spirit Seed, which miraculously sprouts into a fruit tree overnight. Giving in to temptation, Nyanko consumes the fruit, splitting him into three. Seeking a solution to Nyanko's predicament, Takashi and his friends lend a hand, unexpectedly uncovering more secrets the town holds in the process.

Using his Almighty Farming Tool, Hiraku Machio continues transforming his village into an even livelier community as new residents from across the region find refuge there. As he tends the fields that first brought everyone together, Hiraku gradually takes on a greater role by guiding the village's growth not only as the chief but also as a father, ensuring that each day counts.

As always, Shi Miao is tired of her brother's ridiculous antics, and Shi Fen can only hope to escape the clutches of his violent sister. With their friends and classmates in tow, the two continue their dysfunctional relationship as reluctant but devoted siblings.