- Slime Diary That Time I Got Reincarnated as a Slime
- TenSli Nikki Tensei Shitara Slime Datta Ken
- TenSura Nikki Tensei Shitara Suraimu Datta Ken
- 転スラ日記 転生したらスライムだった件
This talks about Rimuru and his friends spending their free time doing something fun together. A spin-off from the main series "That Time I Got Reincarnated as a Slime"
- Tensei Shitara Slime Datta Ken (Adapted from)
- Volume 0/?
- Chapter 0/?