Armed Detective Agency members discuss the most suitable candidate for the second-in-command. Doppo Kunikida is carrying out official errands as planned in his diary as usual. Unexpectedly, a bomb-related incident occurs, challenging the ideals he has always upheld. When weighing one life over hundreds, how will he proceed?

The story follows the coming of age and Shinki battles of Tsubasa, a boy who dreams of becoming a Shinki Master, and his Shinki partner Arnval Mk. 2. (Source: ANN)

One day, Toki Mishiba receives a letter in the mail promising him a large sum of money if he participates in a game. Initially dismissing the message, Toki becomes intrigued and decides to sign up after noticing fine print that says players' safety will not be guaranteed. It is not long after that he meets Nobuto Nakajou and Kazuo Saitou—the teammates assigned to him in the Business Game, also known as Biz Game. The members of the trio quickly form a shaky alliance and call themselves No Name. Bound by nothing but their shared desire for an obscene amount of money, the three step into the dangerous world of the Biz Game, where they must fight against other teams over a data disk containing vital corporate secrets in order to advance and survive.

The slice-of-life battle story is set in a future that has neither World War III nor an alien invasion—just an ordinary future set after our current age. In this world, robots are part of everyday life, and they contribute in various aspects of society. Shinki are 15-centimeter-tall (about 6-inch-tall) cute partners made to assist humans. Equipped with intelligence and emotions, they devote themselves to serving their Masters. These Shinki can even be equipped with weapons and armor to fight each other. Such Shinki are named Busou Shinki (literally, armed divine princesses). In particular, the Shinki Ann (Arnval), Aines (Altines), and Lene (Altlene) serve a high school freshman named Masato. Things change when a new Shinki, the bellicose Strarf, joins them. (Source: ANN)