On her way home from school, the girl Arisu came across a stuffed bear abandoned by the roadside, and she took the poor bear home with the hope of taking care of it. The innocent girl was unaware that she had just brought a pervert home.
When Arisu's mother was present, the bear was just a lifeless stuffed toy, but when it was just the two of them, it revealed its perverse and lascivious side. Arisu did not resist but was rather fascinated by the bear's skilled abilities and its long, 'weapon.'
The two secretly made love until one day Arisu's mother discovered the truth; the stuffed toy that her daughter often brought home was a depraved man. Immediately, he fled, and when Arisu returned home from school and learned what happened, she could only be dazed, reminiscing about the unforgettable memories with her 'bear' from days gone by.