Hiragi Kuroto, was a natural born ability user, but didn't interact with people and lived as if he were a normal human, before the former god user---divine spirit named Fele appeared. "Let's save the world together" "I refuse" Kuroto readily refused the request of being a savior, however due to frantic persuasion, ended up going on the journey. Along the way, they got involved with some unforeseen situation. Despite it being difficult, they finally arrived at the other world, five hundred years later than they expected...the world that Kuroto, the boy who was to become the savior, arrived at was a world that had been saved a long time ago. Due to an unofficial savior, this is an anti-savior story where the entire world is made to be your enemy, start!

An incredibly athletic older brother, Tenryu Taiga. A programming genius girl, Tenryu Fuyuki. Siblings separated for 8 years ended up living under one roof again, after facing the problem—a lack of funds for living expanses. Fuyuki proposes a way to earn money, a core system deeply involved in people's daily lives, a game that awards you money as a prize for defeating malicious bugs in cyber world, the 《Aries》 structure. Taiga after becoming a warrior in the game relying on his inborn senses, is puzzled by the unfamiliar sensation. One day Saionji Rui, Fuyuki's best friend appears and is attacked by a mysterious bug― "I'll be waiting, my prince." Hybrid fantasy battle of cheating siblings begins here! (Source: Baka-Tsuki)