I came to the conclusion that this could be a 4-chapter doujin. Chapter 1 would be played by Miko, chapter 2 would have Hana as the main character, chapter 3 would be with Yulia, and the final chapter, the 3 of them together. The idea is to apply the "saimin" genre. I have better developed the first two pages, which will connect with the others (I will also improve them to match aesthetically with the new ones).