Well, like I said before, Earth-dying Sickness is a disease which is produced by the underworld, right?

If it became known that such a thing was spreading irresistibly in the surface world,

then what do you think the surface world people would do?

Therefore, in this case it was necessary for me to be the "perpetrator" who spread the disease

So that by exterminating me, they know they have "solved" the issue.

This way, the underworld as a whole will not come under suspicion.

Well, it's not like I had a death-wish though.

I explained the situation to a human in the surface world and let her help me attain my goal.

I didn't think she would hit me that hard though!

Give me some tasty wine in return! ♪

Hahaha