This is volume 3.1 of a doujin series that has lasted 25 years. I retranslated it because the original English translation wasn't very good.
Below is a list of all the parts, including remade versions of earlier volumes, and their language.

New version
1 Yield to his deceitful threats (English) /g/1786522/59b862b0d2/
2 A painful shame penalty at her high school (English) /g/979748/8419232b0d/
3.2 Engraved mark of the darkness Part 2 (English) /g/990805/35db7cfc42/
3.3 Engraved mark of the darkness Part 3 (English) /g/981041/0e89360988/
4.1 The second master Part 1 (English) /g/2055969/94712a6f78/
4.2 The second master Part 2 (English) /g/2057429/e265456a28/
4.3 The second master Part 3 (English) /g/2058292/0f83903c3f/
5 The Disqualified Angel (English) /g/2060973/9fcf0ee4b4/

Old version
6 Banquet (Japanese) /g/101352/04ed758ede/
7 Ephemeral love (Japanese) /g/101357/b34770ab9c/
8 Endless sorrow (Japanese) /g/101358/6debe9cfcd/
9 Deformed reality through the glass (Japanese) /g/24815/57ca143282/
10 Desire and repentance (Japanese) /g/23519/af75799697/

11 Indecent extra class at night (Japanese) /g/101362/c8a30bd4e4/
12 Cinderella became a nasty whore overnight (Japanese) /g/55534/b120141b1b/
13 The beginning of the end (English) /g/2387061/9133b3100e/
14 The target of betrayal (English) /g/2512156/e45774fc30/
15 Deflowered at masquerade (English) /g/2578664/31af4f6bea/
16 Happy Merry Christmas (English) /g/187431/d1b4003154/
17 The nightmare at girl slavery auction (English) /g/359457/5872c8e9fd/
18 The truth that He and She realized (English) /g/409756/a3ff48ce32/
19.1 The feast with insanity and desperation Part 1 (English) /g/551646/13a529eb54/
19.2 The feast with insanity and desperation Part 2 (Japanese) /g/565198/c4e7cce28a/
20 The judgement day (Japanese) /g/649029/6253227a4f/

21 The last of her emotional ties (Japanese) /g/1073446/48f2359fa7/
22 Her mind drifting without purpose (Japanese) /g/1073720/e83344832a/
23 Carnival for lusty beasts (Japanese) /g/1082483/48cfc3027a/
24 The end of False relationship (Japanese) /g/1197053/4928cc40f7/
25 The paranoia in the mirror (Japanese) /g/1330215/4c6de3943b/
26 The reason for her smile (Japanese) /g/1869718/4bbf8e1b40/
27 Melancholy in the cage (Japanese) /g/2589349/c6be84eed9/

Other
Shiori Soushuuhen (Japanese) /g/154696/f028f78530/
(C59) Shiori Aganai no Yoru (Japanese) /g/154704/1ec69ae713/
Shiori Soushuuhen 2 (Japanese) /g/154694/070769d7d8/
Shiori no Tsubo (Japanese) /g/154703/c64cea7fce/
(C61) Snow (Japanese) /g/34880/53f2569950/
(C65) Shiori Bonus Track 10-shuunen Kinen Zenyasaibon (Japanese) /g/512328/6c097b830f/
(C71a) Shiori Gaiden Ii Tabi Yume Kibun (Japanese) /g/20236/715ed2434b/
(C71a) Shiori Gaiden Ii Tabi Yume Kibun Scene 2 (Japanese) /g/150473/0eef2edc1e/
(C75a) Shiori Gaiden - Ii Tabi Yume Kibun Soushuuhen (Japanese) /g/520864/99ee24f50f/
Shiori Gaiden Mito Koumon Manyuuki Kuruizaki Hen (English) /g/996638/bdebb9fb96/

Shiori Gaiden Free Oppai Hen (Japanese) /g/1257319/167f7b2b4e/
Shiori Gaiden Free Oppai Hen Okawari! (Japanese) /g/1322807/940635f036/
Shiori Gaiden Shiori no Kinkyuu Jitai Sengen (Japanese) /g/2149328/f680a3f2af/

I'm grateful for these but why do they get tagged with ryona sometimes when there isn't so much as even a slap?

Base +6

Ryona refers to physical or psychological abuse, in this case blackmailing Shiori into doing things. It can also refer to rape and public humiliation.

Base +6

Not according to the tag definition here.
Besides that, I think the mindbreak and humiliation tags already get that sentiment across. It becomes redundant and also confusing if you try to include psychological abuse in the definition of ryona, at least for tagging purposes here. Don't take this personally or anything, I just think it's an incorrect tag.

Base +6, This_One357 +6

Where can I find the tag definitions?

Base +6