Sayaka, a 30-year-old virgin, finally gets the courage to confuse to her university crush on their next outing together. However, she finds herself on the floor of a strange room and does not remember how she got there or what happen. After quick visit to the Dr, she learns she has forgotten the last month of her life. She learns that in the last month she has changed many things about herself her clothes, her single status, and even being a virgin. Now she is encounters everything of her first time for the second time?