Himari and her childhood friends Takumi and Shinjii often have home drinking sessions. Himari and Shinjii developed a good atmosphere, confessed to each other in Takumi's absence, and Himari accepted, leading to them dating. However, this marked the beginning of a nightmare. Himari was a fact that Takumi's casual partner, and Shinjii, while despairing that she climaxed more with him than with herself, never ceased to be aroused.
