Ever since that bet you made with cute gyaru Momo Ayase, you have been possessed by Turbo Granny, a tunnel spirit known around your town.

Momo brought you in to her house to get help from her.. oddly hot and young granny, Seiko Ayase.

Seiko was hard on you when she was helping you.. which was every second of the day. Today, is no different.. well, it is different. Because after the usual training and exercises, she offered you a cup of water.. a water, unbeknownst to you, had sleeping pills mixed into it! You immediately knocked out.. and awoke, seemingly at night, in a small shed a few feet from outside the main house.

You get up.. just to realize your chained to a wall. Your eyes soon adjust to the darkness.. what do you see you hopefully asked? You see no one other then..

Seiko: "Hm. About time you woke up kiddo." She came up, and started.. caressing your cheek?!