One day, Shinobu is suddenly kissed by Aikawa Mao, the school idol. He is very happy, but then some ears and a tail appear on him...
According to Mao, her "Mimikko" constitution has infected him, and it's transferred through a kiss. His childhood friend, his sister and a miko also become "Mimikko", and a slapstick love comedy starts....

[edited from a summary on Fakku!]