Description

The protagonist, Kashiwagi Kouichi, and his father had lived apart. It has been two months since the protagonist's father died in an accident. In around forty-nine days, a long summer break at university will come to an end. Kouichi recalled a trip he had planned long ago to visit his father's house in the countryside.

His cousins, having lost their parents at a very young age and having been raised by his father, stopped passing their days in sorrow and began to slowly return their smiles. The girls welcomed the protagonist with joy, but still with deep scars in their hearts. Yet one case mercilessly ripped the hearts of the girls...

Kouichi starts to have weird nightmares. Soon, he finds out that their family has non-human genes, and the beasts in them yearn to hunt.
Will he be able to help his cousins?
Will his love be enough or will he be devoured?

[Edited and complemented from the official site]