Stained coffee

A person from the creator's world dies and gets reincarnated as Gaster. But which Gaster did he reincarnate as?
Follow the protagonist as he tries to find his own way of making world peace and manipulate people along the way.

A lot of ideas for this story got recommended to me by @Originalsparkstar and @WalterEclips. A lot of thanks to them! 🥰🤗

Start of the story: 2022-04-20
End of the story: