Oh my, it's incredibly well made and fully polished in its presentation! The artwork is wonderful and the character designs are intriguingly original with a wide variety of poses and animations. There's plenty of unique art for the sexual encounters and even a selection of backgrounds to give a real sense of space!
Some of the music tracks, especially the ones with vocals felt a little at odds with the narrative for me. They fit the game's tone well, but slightly overpower the text.
You've made excellent use of the Renpy engine with various text effect, custom colors for different speakers, speech sounds, pauses and even a few mid-speech animations. The writing itself was heartfelt and really let the reader get to know the characters and their personalities. At times I felt like it stayed a little long on the same topic. I sometimes struggle in text games with no choices, but all of the visual touches did a lot to keep me engaged and attentive!
This is a fantastic amount to finish in a month! It's very complete, has a lot going on both visually and textually, and is refined with a wide variety of effects. Amazing work!