GALLERY NOTES:
Always check my most recent uploads for the most up-to-date timeline.

According to Hatoba Akane on their Fanbox, this is currently a one-off that can be viewed as an IF spinoff, and it takes place around Ch. 30 of the main series.
Currently there's nothing here that contradicts the main series canon, and it seems self contained, so I added it to the timeline just after Ch. 29.

UNOFFICIAL SERIES TIMELINE (as of 08-2026):
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ARC 1 - Before Cecilia
01. Birou Kishi Elnose ~Touma Senki Cecilia Gaiden~
02. Moto Birou Kishi Elnose Yoru no Itonami
03. Kokuyou Kengeki Dahlia
04. Eiyou Inka Dandelion
05. Maken no Elena
06. Maken no Elena Season II

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ARC 2 - Valkyrie Commander Freya
01. Touma Senki Cecilia Ch. 01-02
02. Touma Senki Cecilia IF ~Mesu Buta Emalia Mama no Fuufu no Itonami~
03. Touma Senki Cecilia Ch. 03-12
04. Touma Senki Cecilia IF ~Freyja to Vylder no Hentai Gasshuku~
05. Touma Senki Cecilia Ch. 13-19

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ARC 3 - Valkyrie Commander Vanessa
01. Touma Senki Cecilia Ch. 20-29
02. Youkoso! Inma Shoukan Arcadia Ego
03. Senki Choukyou Valkyrie Tamer
04. Inma Shoukan Arcadia Ego Bangaihen
05. Kimi ga Kaeranai Yoru Dokoka de Midara ni Buta ga Aeku
06. Majutsushi Tokkou Joushiki Kaihen
07. [YOU ARE HERE] Touma Senki Cecilia IF ~Valkyrie-tai Tokkunchuu~
08. Touma Senki Cecilia Ch. 30-Ongoing

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NON-CANON
01. Touma Senki Cecilia IF ~Toraware no Senotome Dappun no Utage to Koedame Kuro~
02. Touma Senki Cecilia IF ~Levina Ojousama no Ogehin Detox~
03. Touma Senki Cecilia IF Lunaria to Hentai Ouzoku no Wana Hen
04. Touma Senki Cecilia IF ~Lord of the Flies~
05. Touma Senki Cecilia IF Raikou Senki Freya ~Not True Route~
06. Touma Senki Cecilia IF ~Ulfiora Bangaihen~

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Regarding cropped galleries, I feel conflicted about uploading them, even if I'm just removing MTL. I think I'll only upload cropped versions once a series is fully complete. Hope that's a decent compromise.

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