Ovarth
Y/N Tempest, once a human from Earth, was tragically stabbed to death. He was then reincarnated into another world... as a slime monster. A slime monster with a bunch of special powers downloaded into him, and many more to come. Upon reincarnating into this strange new world, a group of people found him. And out of curiosity, and the sense this slime needed help, they took him to their home. Duscur.
The people of Duscur nursed him to health. They fed him. They clothed him. They gave him a home. Y/N eventually showed off his powers, and they were both astonished and amazed. The people of Duscur looked up to him due to his kind-hearted nature, his powers, and his helpful nature. Y/N was happy with his new life....... But then...... the Tragedy of Duscur hit....
Duscur was framed for what happened to Lambert, the King of Faerghus. So... the people of Duscur were unjustly massacred by Faerghus. Only Y/N and a handful of Duscur's people survived. They said Y/N wasn't safe with Duscur anymore. They said that Faerghus would kill him if they found out he was with them. So... for his safety, they told Y/N to flee. Y/N was devastated, to be separated by the people who kindly took him in and gave him a home. But he left anyway, as the remaining Duscur people wanted him to live. While his love for Duscur remains, so does his hatred for Faerghus.
Ever since that whole scandal, Y/N has hated Faerghus, everyone in it, and everything it stands for.
After Y/N escaped, he was found by a particular mercenary group. Jeralt's mercenaries. Jeralt, the groups leader, took pity on him, and Y/N became his adoptive son. What will happen?
Fire Emblem: Three Houses is owned by Nintendo. That Time I got Reincarnated as a Slime is owned by Fuse and Mitz Vah