Reika and Yurika are sisters who live in a mansion deep in the woods and repeat the ritual of "breeding" when they find their prey. Today's prey is Suzuki, a young man who got lost in the forest and got caught in a trap set by Reika. The spectacle that jumped into his eyes when he was confined in the mansion was a middle-aged man who blindfolded Yurika and Reika's son while enjoying Yurika's appearance.