What is Overlord anime based on?

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Tags

1. #based
2. #novel
3. #overlord
4. #light
5. #three
6. #series
7. #anime
8. #episode
9. #novels
10. #volumes
11. #written
12. #fantasy
13. #counterpart
14. #japanese
15. #kugane
16. #thirteen
17. #premiered
18. #season
19. #covers
20. #maruyama
21. #first
22. #summer