One day, an AD receives a flyer for "Akane-kai," a partner introduction agency catering to middle-aged and older adults. Searching online reveals no information whatsoever. Unable to shake his curiosity, he decides to sneak in undercover—and discovers a secret social club hidden in a quiet residential neighborhood. All members are women with complicated pasts, and the agency encourages clients to first test physical compatibility. Blackiyagi-san (51), a divorced aromatherapist, loves drinking and eagerly welcomes advances. Yokoyama-san (55), a nutritionist and divorcee, is seriously seeking remarriage; if loneliness plagues your nights, let sex bring relief. Moreover, Inoue-san (50), the representative of Akane-kai, begins giving blowjobs under the guise of member care!? Akane-kai is a sexual hideaway for single middle-aged individuals, a place designed for new encounters and pursuit of pleasure.