YellowDuckWorks - Ark Mobius DL Version Final (eng-jap-cn) - Adult Sex Game

This game uses auto-saving.

In the year 2320, a massive, tentacled monster knowns as "The Black Goat" appeared. It had the ability to induce madness, and could only be harmed by magical energy. Unfortunately, the the overabundance of pollution had all but drained the world of that energy.

It's up to you to go to another world, receive magical powers from a beautiful girl, and return home to save humanity!