As someone who likes necromancer classes, I really wanted to like this. But I have decided to drop the series upon reaching the latest chapter (ch. 8). Throughout these chapters, they rarely gave me any feeling that we were following a story about a necromancer. The only things that address the necromancer aspect is the very first chapter and his backstory. Even if his 2 main companions were revived because of his necromancer abilities, you could literally take that reviving and/or necromancer pact detail out of the story and barely anything would change. Rather than a necromancer, this story mainly feels like we're following an OP dark magician.
In terms of the MC's character, I can't help but feel he's way too bland and simple minded. Basically, he's been lonely his whole life since he's a necromancer so he wants to make friends. Sounds fine on paper, but unfortunately it doesn't seem that well executed. I get they're trying to show that the MC never had any experience mingling with the humans so he doesn't know what they would typically do, but I find it hard to swallow that he doesn't have any common sense gained throughout his years of living, whether or not he's been driven out of towns. He just ends up letting his naivety drive him due to his desperate need of friends. Lastly, while I'm a stickler for characters who "speak softly but carry a big stick" or "show mercy to friends and ruthlessness for enemies", I can tell that the author is trying to have the MC follow that mentality. But because of his simple mindedness I mentioned earlier, the way it's portrayed just feels improperly balanced. Most of the time, his excessive need for friends and kindness outweighs his "no shit taken" side that it's hard for the readers to take him seriously. Perhaps if that aspect of his character is properly balanced and we get more insights in the character other than just "I was alone because of my powers so I want friends", then this story could have better potential. But so far, it hasn't reached that point yet.
So in short: story doesn't properly deliver on "Solo necromancer and immortal army" part of its title, characters are bland and aren't interesting enough (especially the side characters), and even if it's supposed to be satirical and some kind of absurdic comedy making use of the "secretly OP but failing to hide it" trope, it unfortunately doesn't deliver in that comedy department. Interesting concept and idea, but not properly executed.
4/10; A pretty bad series that doesn't properly deliver (yet).