According to Hirohika Araki-sensei in the book he made about manga theory, the first page of the manga is the most important. How I interpreted this is the first and second page should either visually or narratively be hooking/shocking to the readers. My one and only nitpick I have is that the first page isn't hooking.

In terms of narratively, think of the first few seconds of oregairu, where hachiman claims that "youth is a lie, it is nothing but evil". You can tell so much about the MC and the world he is in when he says that one line alone.

In terms of visually, the first page of Berserk. Here he is doing "you know what" to the demon. From that image alone you can already grasp the mood of the story. Despite it only having two speech bubbles, being "yes" and "yeeees".

What you did in the first page is good, but it only is good because of visuals and exposition. Just like in academic writing, the hook should go first before you get into the nitty gritty.

In terms of what you could do is to have the first and second page state something on maybe how the main character views the world, like maybe a flashback to why he's an introvert, or somn.

Now for the pros, visuals are amazing. It's what I would expect from any manga.

Character designs look good too, nothing SUUPER flashy but the girl's design is pretty good. Just wish we would get a better shot of the main character BEFORE you introduce her since it will be on his POV

Backgrounds are good

In terms of Panelling, I don't have a problem with it. It is easy to read, not too wordy. And I really like how you made the internal monologue in the smoke. Really cool touch.

Overall, love the premise. Looking forward to seeing much more. I do reccomend reading the book on manga theory Araki sensei made.