FLOWERxFLOWER

The virus FLOWER... This virus parasitizes humans, causing plants to grow and corroding the human mind and body. The infection spreads rapidly, resulting in many casualties. In this age, a way to deal with such a dangerous virus is required. To solve the case, a special unit consisting of former infected people with antibodies is formed, but the members are all a bunch of eccentrics...?!

(Source: Hakusensha, translated)