Holy Girl Paradigm by Morishima Akiko — Ongoing

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Paradigm Girls Academy, a famous catholic combined middle and high school. Not interested in love, Aoi hopes a school life among the virtuous Ojou-sama would turn her into a graceful and high-class lady herself. Riri thought joining a girls’ school would allow her to finally find love. Bonding over having their dreams meet a harsh reality, a beautiful friendship(?) begins.

Chapter 1 released Dec 9 '13
Chapter 2 released Dec 21 '13
Chapter 3 released Mar 13 '14
Chapter 4 released Jul 5 '14
Chapter 5 released Jun 13 '15 Incest