If there was a "demon" who knew the exact position and momentum of every atom in the universe and could use calculations to show the entire process of cosmic events, the past and the future would be displayed before his eyes.
But...
If you know what will happen tomorrow, what will happen tomorrow tomorrow, what is the meaning of your life?
Shen Mian: ... So I committed suicide... But is there something wrong... Why did I reincarnate as a goblin...
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The male protagonist is Rimuru! (I love me so much, the cute king)
The update is on par with "That Time I Got Reincarnated as a Slime".
The heroine is pretending to be invisible.