With a lethal new strain of influenza that allows only one in a million to survive, Japan holds tremendous power. Fortunately, Kazuma possesses the ability to withstand the virus, known as "Cherubim [kerubimu]," and can save his twin sister from its grip. But as he uses his newfound power to ease the suffering of others, Kazuma will encounter unexpected hurdles and heartache alike. A thrilling tale of emerging abilities awaits, blending both humor and drama.