After starting their relationship, Daisuke and Wakaba decided to go trekking to enjoy the autumn foliage. The two had been maintaining a pure relationship, but on this day, they shared their first kiss and deepened their bond. However, they got lost on their way back and ended up wandering in the mountains… They eventually arrived at a mountain lodge inhabited by creatures resembling demons. These creatures set their eyes on Wakaba's beauty and voluptuous body, and began to torment her right in front of Daisuke. After days and nights of internal ejaculation sex, Wakaba's stomach soon swelled with a child whose father was unknown…
