You Asked Me to Catch a Ghost, So Why Did I Start the Twilight of the Gods?

(System + lighthearted + supernatural) In a world overrun by terrifying supernatural phenomena, there has always been one warning: never offend a streetwise mage! When a ghost offers you toilet paper in the restroom, he sets its hand ablaze and beats the ghost to death with a stool! A hell girl wielding a sickle tries to drag the streetwise mage down to hell, only to find herself pinned against the wall. She wants to get angry, but there’s nothing she can do! When terror descends on a massive scale, the gods arrive in the mortal world under the pretense of saving humanity. Everyone thinks the gods have come to save them. But as their schemes are exposed one by one, the streetwise mage unhesitatingly ushers in the twilight of the gods…