Samidare Shizuku, an ordinary office worker whose hobby is writing novels, was troubled.

Ever since the start of this year’s rainy season, something had been off with the people around her. One after another, everyone seemed to be forgetting their memories of him.
Amidst all this, he received a suspicious direct message on a novel-sharing site.

“I think I know what’s causing your troubles. Please visit our office for more details.”

Persuaded by the sender, Sendagi, Shizuku finds himself working hard to create memories with a certain partner—but then…!?