Kamimura Shinsaku

At Shinjuku Toho Yoko, a one-on-one street-style special mahjong game is taking place. There was a girl named Esuka, who reigned supreme here as the strongest. She had won her freedom through mahjong—

A young man from the future lands in 21st century Japan. Not wanting to interfere with past events by maintaining the original time flow, he tries to lead a quiet life.

In the nooks and crannies of the city, in the forgotten corners of rooms, insects are posing a growing threat! Where there are bugs, there is one girl! Her name is Inaho, and when it comes to bugs, this high school girl can solve any problem.