"Why don't we sleep together tonight?"

A veteran solo camper, Kensuke Yamamichi, encounters four stunning, unprepared high school girls during a solo camping trip. Sharing his cramped tent leads to an intense, heart-pounding night of close-quarters closeness and unexpected intimacy in a one-night harem camp fantasy. But the surprise reunion awaits at his new teaching job at Jikigetsu Academy—the girls are his students! Now, as the advisor to their newly formed Camping Club, Kensuke dives into an enviable daily life filled with outdoor adventures, teasing flirtations, and steamy camping escapades that blur the lines between teacher and temptress.

In this ecchi comedy series, protagonist Kensuke Yamamichi, a passionate solo camper and new substitute teacher, experiences a life-changing camping trip. While enjoying a quiet night in the woods, he meets four beautiful girls—Haruki (a boyish leader), Aki (playful and seductive), Touko (calm and mysterious), and Natsuki (energetic and innocent)—who lack proper gear and end up sharing his small tent due to the cold. Alcohol-fueled antics and tight sleeping arrangements spark erotic tension, leading to impulsive intimate moments that Kensuke assumes are a fleeting "harem camp" thrill. The next day brings more steamy encounters at a hot spring. Shockingly, upon starting his teaching role at the academy, he discovers the girls are his students, and they eagerly recruit him as advisor for their new Camping Club. What follows is a series of club activities blending genuine camping lessons—tent setup, campfire cooking, hiking—with escalating harem dynamics, jealous rivalries, and frequent risqué situations in nature and school life. The story masterfully mixes outdoor realism with fanservice-heavy comedy, as Kensuke navigates his desires, professional boundaries, and the girls' bold affections in an endlessly enviable routine of adventure and seduction.