Tsuyoshi is a 22-year-old third-year university student residing alone in his apartment. He exhibits a distinct preference for strong canned chuhai, a Japanese alcoholic beverage combining shōchū and carbonated water, which consistently features in his interactions. His narrative centers on romantic and physical entanglements with multiple married women—Yui Koriyama, Ai Natsuno, and Miki Kanzaki. These relationships unfold as risky and intimate, often ignited or facilitated by chuhai consumption, though each encounter varies in circumstance. The story adopts an omnibus structure, with each arc focusing on Tsuyoshi's episodic affairs with a different married woman, highlighting their transient nature. Tsuyoshi drives these encounters, with the married women actively pursuing and engaging him. Their dynamics involve mutual attraction and bold advances, particularly evident in his interactions with Yui Koriyama, blending romantic and erotic themes throughout.