The Lady's Training Session, with the Slimes
Eliaria and Ryoma practice magic and combat in Gimul. They practice fighting against the weak but numerous monsters now infesting the abandoned mine shafts.
Aired 01/11/2020EP 5 - The Lady's Training Session, with the Slimes

2020
By the Grace of the Gods
Only 39 years into a life full of bad luck, Ryouma Takebayashi passes away in his sleep! Taking pity on him, three divine beings show compassion by reincarnating him as a young boy to a magical, new world.
Now he spends his time researching and caring for slimes. But after healing an injured traveler, Ryouma decides to set out with his new friends on a journey to use his power to help others.
(Source: Funimation)