Story of The Ancient Demon King!

Is it like eminence in the shadow,where we get mentions of protagonist's training or is it just a skip to op, with no mention of training?
Edit: I've read the first chapter. It is exactly like eminence in the shadows, with the MC training for an imaginary ideal, then reincarnated into a magic world and immediately figuring things out.

It sure is, welcome to Eminence in Shadow II

super into this story, but the last update was so long ago. has this been dropped?

Is there any training arc here? The protagonist just straight up getting powers at random chapters with almost no sense or any explanation at all so I was wondering if there was any kind of plot development where his progress is shown

good?

I-is that...a [Chuunibyou] tag I see...?

Alright, not quite EIS level, but not that far, either, and it IS very similar
MC is much more moderate than Cid, and although he tries to live to be a demon king, he isn't really the right material, he only kills evil and people barely know of him, he's trying to make a hero but has no success, and people like him too much for his plans already as of ch50

Good?