Beppu City, Oita. A big art exhibit named "Techmix" will soon be held, it is one of Beppu's traditional bamboo crafts fuses with the latest digital art.

The art exhibit will host two groups, the head of the distinguished Ana family which produce a large number of artist, and Artenuv, which creates art using leading-edge technology.

However, the high profiles of representatives are the cause of envy and antipathy, as is the exhibit of threats from those who have problem with it.

The main character Ken is a junior detective hired to provide security for the exhibit and make their way to Oita.

Empathizing with the people of Oita that participate in the exhibit and praying for their success. The protagonist and Ken decide to work as a security team.

However, an accident happened in a place they would never expect...