I was reluctant to download at first, thinking it would be another stale vn... thank god I decided against that and played Eternum! It was much better than anticipated, lots of character depth, an unironically funny humor, interesting plotline and stunning graphics.
I especially like the way new characters are introduced and new character traits are discovered. They are all written very well!
By the way, you've nailed Chang's character! I have to laugh everytime he appears!