Isekai Maou to Shoukan Shoujo no Dorei Majutsu (How NOT to Summon a Demon Lord) is about a NEET man who got transported to another world as a demon lord. On this episode, Diablo got summoned and he finds out on what's going on.
Yes, finally! I was waiting for the anime adaption after reading some of the light novels. So it was cool to see Diablo try to be aggressive despite being anti-social. Also, they nicely revealed the main plot that our male lead has to solve. Other than that, the series does have some similarities to the Overlord series. Now what's going to be the next plot? I definitely can't wait. Overall, nice introduction and some action.
Conclusion: Nice introduction and some action.