Artist patron site: https://fantia.jp/fanclubs/7219
Pixiv: https://www.pixiv.net/member.php?id=82301

There's a basic introduction to the Magical Student series here: /g/1235006/6d446f4bb0/
Miri appears in the following doujins:
/g/891015/a617ab447d/ (Magical Student Alice 6)
/g/1226838/68e8b31685/ (ImpactSwing)

-DESCRIPTION-
(info collated from google translate)

Miri Sasai is a diminutive brown-haired 15 year-old girl. She can transform into a magical girl with orange hair and fighting gauntlets. She has a "barrier" ability and is specialized in defensive support. She is friends with Yuko, a classmate and fellow magical student, and accompanies her on many missions.

Miri is trained in kendo and as such is able to defend herself to some extent even as a regular girl, provided she has a weapon available (see p12). This skill has saved her from being raped before (see p24)

-CONTENTS-
(all guesswork from google translate)
p1-4: cover and character sheet
p5-7: Excerpt of Magical Student Alice 6 (linked above)
p8-11: Events of Magical Student Alice 6, a bad end for Miri. mos noted that they are all getting pregnant here because they are being raped in their normal forms.
p12-13: Miri valiantly defends herself as a normal girl, but is overpowered and violated
p14-16: Yuko and Miri captured by the "shower caps"
p17: Yuko and Miri out shopping.
p18-19: Excerpt of ImpactSwing, linked above. Miri fights a slime monster with a baseball bat.
p20-25: "Caught in Public" with Yuko
p26: Miri's magical girl form falters
p27: Miri and Miyako tied up.
p28: defeated by a mob, saved by Yuko
p29: Almost raped
p30-33: Unknown sketches.
p34-41: Yuko and Miri vore
p42-48: Raped in class
p49-51: Extras

OTHER CHARACTERS:
/g/1235006/6d446f4bb0/ (Character Guide)
/g/1263363/1c7a48b3d4/ (Alice)
/g/1263354/8f2a30c457/ (Asuka)
/g/1256909/4896705cd4/ (Yuko)

@nosedigger

The detailed post is very appreciated, the series is much more appealing with understandable context.

Base +6