Because it’s something that will counterbalance Firo’s actions.
The expenses are quite severe, but I can probably manage with my current finances.
“Ah, also, there might be a disturbance in the Castle Town soon, so please be careful.” (Naofumi)
“I got it, Laddie.” (Oyaji)
“Worst case scenario, there may be an incident with the reason being that I am a regular here. Please take care.” (Naofumi)
“You’re too prone to worrying.” (Oyaji)
“Because I wouldn’t be able to survive if I wasn’t.” (Naofumi)