In front of Hide, who broke up with a childhood friend after a fight,
his descendant, Silica, appears five generations later.

At this rate, Hide will spend the rest of his life alone, and Silica's existence will disappear!
In order to change her future, she got on a time machine.

Silica tries to get Hide to form bonds with many girls, making him
go back in time to her past and start his life over from his school days.
In order to protect his future descendants, he forms sexual bonds with his childhood friends and female classmates!!