HII I LOVED READING THIS. First off the UI and artwork is absolutely gorgeous, it really reminds me of the 2000s growing up as well as all the random Nightcore videos I used to watch on Youtube lol.
The character dynamics were really good as well. The way Miyuu and Chinatsu keep pushing each other way was really tense but in a way thats intriguing to watch. The ending was really good, especially because as someone else has pointed out you're not entirely sure if they're actually going to change after this or if its just empty reassurance said in the heat of the moment. This was really fun to read!