Very nice game. I like this kind of atmospheric games. I'm not the biggest fan of visual novels but I find myself playing some from time to time. I didn't know what to expect but I was pleasantly surprised.
I'd started the sequel before reading its description and realizing there was a first part :P. Maybe this is just me, but I sometimes prefer to play before reading it in order to let myself be surprised by the game itself (also with movies, etc.). Perhaps you could add a mention/link to this first part in the other one's title screen? Unless they may be played in reverse order for a different experience.
For anyone not hearing any audio (again, maybe just me :P), you have to allow autoplay in this site.
Also, I found a bug/bugs, not sure if you're aware of it or where I should be posting it. I'll try to keep it spoiler free: it involves going back to an outdoor area near the end after triggering the event there. The text reappears as if entering it for the first time and a related item gets highlighted but isn't actually usable. I tried to reproduce it on other playthroughs but I couldn't (more like speedruns by now, which might be affecting the result). Instead, now I always get stuck without choices and the last displayed text after trying to go north (west and third options loop as intended). This happens after the event and only after reentering. Reloading and continuing leaves me with the same text, no options and the initial bus background.