What is it you want?
What is it you want so much you would do anything to get it?
And how far would you go to get it?
Kako no Koi is the story of Naoya Kiriyama, a normal boy at Moboroshi high school. His everyday life is nothing to get excited about: the biggest delinquent at his school considers him his buddy, his younger sister treats him with nothing but disdain, and his mother believes he must have done something to deserve that. The only bright moments in his days are those he spends with Chizuru, his cheerful and understanding childhood friend.
But after Naoya one night has a strange dream of standing in front of a great weeping willow, his life is turned upside down. His sister suddenly develops an interest in the occult, and her personality begins to change. Naoya's childhood friend has a terrible suspicion that may very well spell disaster for his entire family. Could this all be related to the tragedy of Moboroshi ten years ago when a local shrine burned down, apparently for no reason? Or is something even more sinister at work here?
Whatever it is, it brings change. Change brings loss. Loss brings sadness.
And with sadness comes... fate.
You decide what that fate will be.