Yuusuke was a shut-in with a dislike of other people, until the zombies appeared. Fortunately for him, for some reason they wouldn't attack him.
As he was exploring the zombie-infested town, he came across Mitsuki and her brothers holed up in a supermarket and started living with them.
Just as they were adjusting and feeling happy with their new life, an unfortunate incident occurred that spelled the end of their time in the supermarket.
Instead, they took flight for the town hall, where they'd heard the rest of the survivors had taken refuge.

Takuya just moved to Tokyo to start university, but the big city is a bit overwhelming, so he lives with his cousin, Takashi, and his beautiful wife. His life is quite ordinary, until one evening, while relaxing after dinner, a burst of light fills the room and a beautiful girl appeared right before Takuya's eyes! As she drifted slowly down, he noticed she was asleep. He held out his arms to catch her... and from that moment forth his life has never been the same.

You play as a college student, who returned in his hometown during holidays and about to start his summer practice in the consulting company under the guidance of his mot. . . . . family's old friend.
Our hero will meet many obstacles during this period as well as many great and lewd adventures. Follow the main character as he gets himself (and You.) into countless different sexual situations.​

A spin off of "Granddaughter".
It is a work of character Hanako alone of "Granddaughter"​

A spin off of "Granddaughter".
One of the characters from Granddaughter comes back as the main focus of this new work.?