Story

Not to be confused with World Mode.
Story is a game element where story entries featuring certain partner characters can be unlocked and read.
Prior to mobile v2.0.0, story snippets could only be read from song select via certain songs.
From the splash text that appears when first opening Story Mode:
The Main Story, Side Stories, and Short Stories are divided into various numbered paths, each focused on a Partner, given in the infobox above.
Paths are themselves divided into entries, which follow a Path-Entry numbering scheme.
Each entry becomes highlighted when its prerequisites are met, and fully unlocked and readable after completing its Story Challenge. Story Challenges generally require a particular songs to be played with a particular partner.
The complete list of stories by release order is as follows:
Mobile:
Category 	Path	Story 	Partner/s 	Version (date) [Expand][Collapse]
Main Story 	0 	Arcaea 	Hikari / Tairitsu	5.4.0 (2024-03-08)
Main Story 	1/2 	Eternal Core 	Hikari / Tairitsu	1.0.8 (2017-03-09)
Main Story 	2 	Vicious Labyrinth 	Tairitsu 	1.5.0 (2017-11-03)
Main Story 	1 	Luminous Sky 	Hikari 	1.7.0 (2018-07-16)
Main Story 	V 	Vicious Labyrinth / Luminous Sky Entry V-1	Hikari / Tairitsu	1.7.0 (2018-07-16)
Side Story 	3 	Absolute Reason 	Saya 	2.0.0 (2019-03-21)
Main Story 	V 	Adverse Prelude Entry V-2 to V-5 	Hikari / Tairitsu	2.2.0 (2019-07-18)
Side Story 	4 	Crimson Solace 	Kou 	2.4.0 (2019-10-08)
Side Story 	5 	Ambivalent Vision Entry 5-1 to 5-6 	Lethe 	2.6.0 (2020-03-25)
Main Story 	VS 	Black Fate 	Hikari / Tairitsu	3.0.0 (2020-05-27)
Short Story	6 	Scarlet Cage 	Shirabe 	3.0.3 (2020-07-08)
Side Story 	7 	Ephemeral Page 	Alice & Tenniel 	3.3.0 (2020-12-03)
Short Story	8 	Obsidian Blade 	Mir 	3.5.2 (2021-03-09)
Side Story 	9 	Esoteric Order 	Lagrange 	3.6.0 (2021-05-11)
Side Story 	10 	Binary Enfold 	Eto & Luna 	3.10.0 (2021-12-9)
Side Story 	S 	Divided Heart 	Shirahime 	3.10.0 (2021-12-9)
Short Story	11 	Colorful Dream 	Ayu 	3.11.2 (2022-01-20)
Short Story	12 	Unseeing Eyes 	Vita 	3.12.0 (2022-02-17)
Main Story 	F 	Final Verdict 	Hikari / Tairitsu	4.0.0 (2022-07-07)
Main Story 	 	Silent Answer 	Hikari / Tairitsu	4.0.255 (2022-07-13)
Side Story 	5 	Ambivalent Vision Entry 5-? to 5-?-3 	Lethe 	3.12.0 (2022-02-17)
Short Story	13 	Dark Ambition 	Ilith 	4.3.0 (2023-03-02)
Short Story	14 	Astral Sea 	Nami (Twilight) 	4.4.6 (2023-05-25)
Side Story 	15 	Lasting Eden 	Maya 	4.7.0 (2023-08-18)
Side Story 	16 	Lasting Eden Chapter 2 	??? 	5.0.0 (2023-09-27)
Side Story 	17 	Sunset Radiance 	Kanae 	5.2.6 (2024-01-12)
Switch:
Category 	Path	Story 	Partner/s 	Version (date) [Expand][Collapse]
Main Story 	1/2 	Eternal Core 	Hikari / Tairitsu	1.0.0c (2021-05-18)
Main Story 	2 	Vicious Labyrinth 	Tairitsu 	1.0.0c (2021-05-18)
Main Story 	1 	Luminous Sky 	Hikari 	1.0.0c (2021-05-18)
Main Story 	V 	Vicious Labyrinth / Luminous Sky Entry V-1	Hikari / Tairitsu	1.0.0c (2021-05-18)
Main Story 	V 	Adverse Prelude Entry V-2 to V-5 	Hikari / Tairitsu	1.0.0c (2021-05-18)
Main Story 	VS 	Black Fate 	Hikari / Tairitsu	1.0.0c (2021-05-18)
Side Story 	3 	Absolute Reason 	Saya 	1.0.0c (2021-05-18)
Side Story 	4 	Crimson Solace 	Kou 	1.0.0c (2021-05-18)
Side Story 	S 	Divided Heart 	Shirahime 	1.0.0c (2021-05-18)
Side Story 	5 	Ambivalent Vision (Entry 5-1 to 5-6) 	Lethe 	1.0.0c (2021-05-18)
Short Story	6 	Scarlet Cage 	Shirabe 	1.0.0c (2021-05-18)
Side Story 	7 	Ephemeral Page 	Alice & Tenniel 	1.2.0 (2021-09-16)
Side Story 	9 	Esoteric Order 	Lagrange 	1.2.0 (2021-09-16)
Main Story 	F 	Final Verdict 	Hikari / Tairitsu	2.0.1 (2023-03-16)
Main Story 	 	Silent Answer 	Hikari / Tairitsu	2.0.1 (2023-03-16)
Short Story	8 	Obsidian Blade 	Mir 	2.0.1 (2023-03-16)
Side Story 	10 	Binary Enfold 	Eto & Luna 	2.0.1 (2023-03-16)
Short Story	11 	Colorful Dream 	Ayu 	2.0.1 (2023-03-16)
Short Story	12 	Unseeing Eyes 	Vita 	2.0.1 (2023-03-16)
Note: The Path numbers for Divided Heart, Ambivalent Vision, and Scarlet Cage were changed from 5/6/7 to S/5/6 in v1.2.0 for consistency with the mobile version numbering. Scarlet Cage was also moved from Side Story to Short Story.