The Strongest Butler of the Myriad Worlds

Pyros transmigrated to the Fate world and became Illya's foster brother, the adopted son of Irisviel and Kiritsugu Emiya.When the Holy Grail War broke out, because Illya wanted to travel, the system awakened.『Ding! The plot selection system has been bound, please make your choice!』『1: Reject Illya's request, reward the host with the title of Cold-Faced Butler! And Illya's hatred!』『2: Take her traveling, reward the host with the title of Gentle Butler, and Illya's resentment!』『3: Take her to Fuyuki City, randomly reward an ability card!』“Is there any question? I choose three!”『Ding! Congratulations to the host for the successful choice, you have obtained…』Pyros, who simply thought this was just the Fate world, after taking Illya to Fuyuki City, suddenly...