Tsukimichi: Moonlit Fantasy #4

Plot

Makoto Misumi was reincarnated into another world. He finally makes it to the city of Tsige, where the two daughters of the city's famous merchant, Rembrandt, were cursed. In order to cure this horrifying sickness curse, Makoto found his way to the Rembrandt manor and crafted the medicine. But there was no time to relax… a new curse activated and the girls continued to suffer. Unable to bear watching the Rembrandt family suffer, Makoto activated his overpowered cheat skills…