Morning of first day summer vacation. Masato woke up and was shocked early.

"The erection is not settled!?"

Then, Oneesan of housemaid suddenly comes there, semen is severely squeezed with fellatio...!? As it is, Masato was brought to grandfather's house, it is said it passed down to the Ikuga family "Power of the powerful incubus that makes it a pervert if it fails in control."

And,"If the appearance of power is seen by relatives, make the person the successor of the Ikuga family" Grandfather's last request.

Thus, the power of incubus appears, masato to which the sexual desire doesn't stop, to realize late grandfather's wish, a lewd intensive training to control the power of incubus with three housemaids will be done.