It looks like there are two editions of this. The first one is in a single volume (which I previously translated), and it includes the stories up through chapter 4. In the second edition, the stories are broken into two volumes, and volume two includes several additional postscript stories. This translation only includes the additional content.
https://www.mediafire.com/file/q0e0aoizflrbefx/Watakushi_no_Ohimesama.zip/file
Volume one is at:
https://safe.yuri-project.net/res/26807.html
Nice Hakamada Mera project in five chapters. Content Warning: Lesbians making the earth shake not like that, honesty wins for once, little sister makes sure the deal gets done.
Full disclosure - in some blurred, drugged out yuri haze, I thought I got the raws for this project here. If I did, I can't find the project page any more. Maybe it came from the gaping abyss that is /u.