Akari is a homely, honest, and pure woman. She's only ever had normal sex with her husband. Recently, however, they've been experimenting with different things, and their sex life has become more lively. But they still feel something is missing, so she asks some friends to plan a thrilling, suspenseful trip to the hot springs. The night before their trip, her husband inserts a toy into her anus for the first time, and while she's embarrassed, she feels it and has sex with him as usual. At the hot springs, she's embraced by an acquaintance in front of her husband, unable to resist climaxing. While her husband is out, she's tied up and made to cum hard outdoors, leaking pussy juice and squirting. Then, an acquaintance takes her out for an embarrassing outdoor urination session and a car blowjob! Then, in the outdoor open-air bath, she's fucked hard in front of her husband, her whole body going wild as she orgasms!