Let's see here...
-The cover/banner: Great art. Very alluring. While I think the title could be a bit bigger and clearer, it is pretty good as it is.
The description is written awkwardly from the second paragraph on.
Due to previous life events, Asura believes that people betray even their loved ones, once they find something they want more than their affection towards them.
Even though being a very hard worker, Asura struggles with studies. But, when real-life troubles come, his demon tactics save the day.
-How hooking the prologue is: It's an interesting start. It conveys what to expect from the novel well. But, few things could turn a reader away.
Grammar errors. Many places either lack a comma or have an extra comma.
Unnatural dialogues. The conversation between the librarian and Asura is very odd.
Atmosphere/Tone. The intro is snappy, too much so. It would be a good idea to add more descriptive lines. I had originally made a similar error in my own prologue and adding descriptions of the surroundings and the general atmosphere of the setting helped it a lot.
The last line! It should be much more dramatic than it is!
"You want money? You can have all of it. Just stop this. I can't stand it. Why are you doing this? Just leave me alone!"undefined> "No. I don't need money."
"What do you want? WHAT ARE YOU!?" He cried out.
"I am the Demon King and all I need is Advanced Physics Volume 3. Because tomorrow, I have got a test to pass."
As I mentioned. The atmosphere is already not conveyed well, and this last is meant to be your main hook. It has been written like a simple sentence. Adding some lines that describe his voice and breaking the last line into different parts would be a good way to go. More experienced authors will probably be able to give you much better ways to make that line more hooking.
-Impressions on the first few chapters and whether they make me want to keep reading: The story is very interesting, so many people will stick around for that. I have noticed a few issues that made me want to turn away, I'll list them.
There is no information about the settings at all. Be it the demon world or the Earth. If I don't know what the character is seeing then visualizing becomes very difficult.
Asura's emotions are very unclear. The description, title, and plot, all point towards a good deal of character growth but our main character has too many emotions for some things and too little for the rest. For example, he was happy about becoming the demon king after getting betrayed? And then he remembers that betrayal for a long time, as hinted in the description and the prologue? Even when he meets his human mother, he understands her love for him a bit too soon for an orphan in a forever violent world.
Chapter 5. What happened in the beginning? This is a very personal opinion, but I think many readers will agree that anime-esque ecchi scenes are the best way to tell your readers that your story is another typical haremy wish-fulfillment. Which, I can clearly see, it isn't. The later chapters and the plot are very interesting with a plethora of potential.
-General story and/or artwork: The art is very nice for the thumbnails and the writing flows well other than the few issues I pointed out and some grammatical errors. It's done well, no complaints.
-Style, tone, and setting: I covered this above.
Writing/storytelling style and how smooth it is: This too, I'll say it again though. Your story flows very well. The pacing is very nice and the narrative is enjoyable.
Overall. I really like the story but strictly from a reader's perspective, it could be shallow at times. The plot is very intriguing and that couples with your smooth writing style make it an enjoyable read that one would stick with. I got to learn many things and also found places I can improve in my own novel from reading this. Keep up the great work!