The player is a half-human, half-elf protagonist who belongs to an underground organization,
at the lower levels of the World Tree, where the elves reside. Working from the shadows, he protects the peace of the underground slums beneath the great tree’s roots. However, a traitor appears within the organization,
causing a massive outbreak of black sludge-like creatures that begin to pollute and erode his home. To resolve the incident, the protagonist receives a revelation from the goddess. Along the way, he must fight together with all kinds of elf girls and crush the ambitions of the mastermind behind the chaos.

With male elves suffering from declining fertility, the half-human protagonist seems to have become a target?! Enjoy lighthearted and comedic daily-life stories, heart-racing CG events, and dynamic visual scenes.