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

There's a basic introduction to the Magical Student series here: https://e-hentai.org/g/1235006/6d446f4bb0/

Shea appears in the following doujins:
https://e-hentai.org/g/1263819/34d813a423/ (RareDischarge)

-DESCRIPTION-
(info collated from google translate)
"Niimi Shea (18) ... Magical student who defends the same area as Maki. My elder sister character whose dream bulges because she has a boyfriend."

Shea's magical transforming item is a necklace that she wears under her normal clothes (see p22-23). She hangs out a lot with Nanai, another magical student. She can't get pregnant in her magical girl form but is vulnerable in her normal form.

-CONTENTS-
(all guesswork from google translate)
p1-3: cover and character sheets
p4: cover of -RareDischarge- solo doujin, linked above
p5-18: Shea out swimming with Nanai and her boyfriend when they are attacked.
p19-21: Extras from the swimsuit story.
p22-23: Vs "Thunder Gyo Rui"
p24-26: Older version of "Thunder Gyo Rui" story
p27-28: Unknown
p29-30: Raped in an alley while unconscious
p31-35: Tentacle rape
p36: Shea's magical girl form falters, leaving her in costume as a powerless normal girl.
p37-47: Unknown stories and sketches

OTHER CHARACTERS:
https://e-hentai.org/g/1263354/8f2a30c457/ (Asuka)
https://e-hentai.org/g/1256909/4896705cd4/ (Yuko)
https://e-hentai.org/g/1264824/b99abc1478/ (Lily)
https://e-hentai.org/g/1235006/6d446f4bb0/ (Character Guide)

感觉作者故事有点跳跃... 凌辱又描绘得不够细致... 故事性和实用性都不太行啊...

Base +6, kingkitan00 -6

秋山澪？

Base +4, kingkitan00 -6