Yuuto Hikami is just your average male high school student. That is, if you exclude his being the only son of a long line of onmyouji (spiritual masters). And, of course, the fact that currently there are two supernatural gods staying at his house - Guardian Deity sui (currently suffering from amnesia) and the water god Rin (a cool recluse)! As the two gods constantly battle each other for Yuuto's heart, there is never a dull moment in his life!