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The gears of the era turned slowly, and a "divine stone" fell from the sky, bringing with it the seven major "sins". The dark and boundless demonic realm, the strange sea of demons, the sky-reaching demonic tree... Sin, what is sin, greed? Fury? Lust? ... There is no sin in this world.

The earth is being eaten! I came to a strange world, and I lived alone for ten years! Suddenly one day I found that there was an extra collection room in my body...