During the last summer of their student life, two high school girls, best friends, go on a girls' trip and stay at a private lodging. However, it turns out to be a horrible inn run by a devilish owner. After being drugged with an aphrodisiac, the girls lose all sense of self and shame, squirting copious amounts of fluid as they cum in convulsions. Eventually, the devilish old man impregnates them and they become his sex slave... The girls' trip to make the best memories turns into a nightmare from which they can never return. KM Produce Co., Ltd.