Oh my godd they were roommates((
First off: THE UI IS GORGEOUS HOLY F-- I really love what you did with the main menu, the toggle shortcut button, the pause (?) menu, and the save/load screen--I can tell so much effort went to this; it's so beautiful! The achievement? system is also a really nice addition, the description kinda threw me off too (in a good way!)
I find the concept of the whole story pretty intriguing, and I think the pacing is good! Ban's snarky comments though...I love them for that. And Lilia is such an adorable office lady <3 I like her and Rosie's sprites (Rosie's pose looks like she's constantly touching Lilia's shoulder and honestly love her for that) I hope nothing bad happens to them...