7年付き合った彼氏に裏切られ、傷心中の美容師・有紀。自分へのご褒美に訪れたエステで、無口なエステティシャン・アカリと出会う。彼女の温かく優しい施術に身も心も抱かれ、初めて知る女の子同士の快感に溺れてゆく。雨の屋上で交わした「1年限定」の恋人契約。汗だくヨガでの逆転ペニバン、誕生日の生クリーム双頭ディルドなど濃厚な性愛を紡ぐ2人。やがて約束の1年が過ぎ、涙する有紀にアカリが囁いたハッピーな結末とは_。

Yuki, a hairdresser heartbroken after being betrayed by her boyfriend of seven years, visits a beauty salon as a treat for herself and meets the quiet esthetician, Akari. Embraced body and soul by Akari's warm and gentle treatment, Yuki becomes immersed in the pleasure of intimacy between two women for the first time. They make a "one-year limited" lovers' contract on a rainy rooftop. The two weave a passionate love story, from reverse penis bondage during sweaty yoga to a double-headed dildo with whipped cream on Yuki's birthday. Eventually, the promised year passes, and what happy ending does Akari whisper to the tearful Yuki…?