Murasawa Itsuki of the protagonist. It was a very usual, cheerful originally girl. However, it suffers unhappily like losing the blood relationship due to the traffic accident at a dash. It has shut ones mind completely, result of consultation by relative. Though aged grandparents will receive. It moves in to the girls school of the original all dormitory system because it troubles not much. It shuts ones mind and naturally the transfer student who avoids relations of the person each other doesn have whereabouts. Itsuki was not able always to manage long time after school. One day she unfamiliar strays off into an old schoolhouse without the thing that the person enters usually not much school. And, then it is attacked by the living thing of the tentacle of the mystery and the experience of being put is of planting something in the interior of the womb. It loses consciousness to fear of the remainder. Though it woke up near an old schoolhouse afterwards. There is especially not a change in the what on the body either. No I don know really the thing what? that actually woke up... However surely in her body, the living thing of the tentacle began to grow up.