The brother and sister who separated because of parents divorce, it rejoins after an interval of ten years.

Younger brother met after a long time, it doesn't grow up so much somehow, the body being small. It was the older sister who felt relieved to the younger brother who smiled with "oneechan" in the same way as old times, when cohabitation was started by two people, she began to feel the accident gradually.

It suddenly becomes emotionally unstable, the older sister who tries to calm it is thrown down. Though it resists, his older sister has been defiled by younger brother. Younger brother also begins to weep when she enduring painful of the deflowering, toward the older sister Sorry is repeated.

It is an influence of the abuse that accepts from father. Serious damage is received to the heart, it becomes impossible to spend a normal life.

The older sister permits younger brothers doing, it sympathized to have suffered alone until now, it is determined that the normal life can be spent somehow.