Perfect Planet

The near future. One day, Kaneda, a member of the expedition to the planet "RED" whose environment resembles the earth, encountered a mysterious plant called "Argo," native to RED, in the prohibited "Area 7" inside the spacecraft. "If you see Argo in estrus, run away." That warning was futile. With his limbs entangled and his holes violated, Kaneda couldn't help but drown in pleasure. Shiraishi, one of his superiors, tried to save him. However, it turns out that Kaneda is caught in the midst of the research team's terrible conspiracy?

(Source: Julian Publishing, translated)

Perfect Planet began as a web comic released on the author's web page from 2008 to 2010, and was published in print with redone art by Julian Publishing on March 25, 2016. A continuation was sold as ebook chapters from September 23, 2016 to September 25, 2017.