Isekai

- Reincarnated into another world (as a slime)
- Super OP male lead
- Monster swearing loyalty to slime(ML)

- Iruma (ML) been sold to a demon by his parents
- Living in the demon world and go to school there (fit in perfectly)

Part 1
- Reincarnated as a little girl
- Has an illness that make her body weak
- Obsessed with book
- Create new invention

Part 2
- Got Baptism and is now an shrine apprentice in the church (a job)

- Reincarnated into a world with magic
- Take care of 2 kid who he met in the forest
- Has cute monster familiar