A high school teenager, after dying, is reborn as a big-mouthed flower. Originally thinking he could bask in the sun, drink water, and lie down every day, he discover the danger of being a plant in the other world, at risk of being eaten by monsters or dug up by hunters for alchemical purposes. Luckily, he possess a "Flower" system that continuously assimilates the characteristics of other plants. He will try to evolve into a guardian celestial plant of the Giant Continent