Kono Watakushi ga Saimin ni Makeru Wake Arimasen wa!
Twilight Flasher ENG (incest)
Kioku Soushitsu
Theater Drama City
S to M to M to S
[Pull Top] Rakugaki 3
(C89) [Yamaneko Jinja (John Inu)] UNDERGROUND ASCENDANCY (Touhou Project)
[TLG (bowalia)] Chika Tougijou Sen - Underground Colosseum Sen 2 [English] [8/u/ Scanlations] [Digital]
FLASH BACK
[Red Ribbon Revenger] Valhalla ~Joshou~ (Tokyo Underground & Spiral)
Roshutsu Wakazuma Kikiippatsu! - Flashing wives!
(C87) [The Seventh Sign (Kagura Yuuto)] RF Private Room no Ichiban Amai Yoru (The Legend of Heroes: Trails of the Flash) [Chinese] [湿身之蛇汉化组]
[Nanase Makoto] Chika Ryuushutsu - Leaked to Underground
[Nawanoren (Gachoon)] NNDP 9 (Dirty Pair Flash) [2017-12-31]
[Gekka Kaguya] Shimai no Kankei | The Relationship of the Sisters-in-Law (Bengoshi -> Futanari -> Namahaishin) [English] [Komori Translations] [Digital]
[Unknown] Chika Teien | Underground Garden [English]
Roshutsu Kaijin Flasher Girl ~Kyonyuu Sukeban Marimo AFTER EPISODE~
Underground Hotel Vol. 3
(Reitaisai 10) [Kuma-tan Flash! (Hanao.)] Muishiki no Kyuuai Koudou (Touhou Project)
[Rinsun] KNight Mare Underground ~Shimai Kishi, Kanraku Dungeon~ ch. 2
Underground Hotel
[Ameya Kirica] Chichi Pri! [Chinese]
(Reitaisai 7) [Kuma-tan Flash! (Hanao)] Mebius:loop+Omake (Touhou Project)
[ffkan]Underground Battle 5
(C92) [Kuma-tan Flash! (Kumao Mofumofu)] Yamakaze no Koto, Suki? (Kantai Collection -KanColle-)
Supplement
(C90) [Kuma-tan Flash! (Hanao.)] Love Trip (Kantai Collection -KanColle-)
Shinso Makou Shoujo THE COMIC White Holy Sword Rizuve and Red Flash Raiza Episode 1
(C61) [JUMBOMAX (Ishihara Souka)] NAJICA FLASH (Najica Blitz Tactics)
(C93) [ARCHANGEL (Ayanokouji Haruka)] PRISMA FLASH (Fate/kaleid liner Prisma Illya)
[FLASH POINT] コピー本
Pedolia! underground
(C80) [Kuma-tan Flash!, Eclipse (Hanao., Rougetu)] KUMAlipse2 (Touhou Project) [English] {LWB}
(MILLION FESTIV@L 3) [Kuma-tan Flash! (Hanao.)] Masaka Idol o Yogosu Tsumori Ja Nai Desu yo ne? Dame Producer (THE IDOLM@STER MILLLION LIVE!)
Honey Flash Seven
[A-mania9's] BEHAVIOUR+17 ~BUNNY FLASH!!~[English][lodhel] (part 1)
(CR21) [Rocket Kyoudai (Various)] Honey Flash (Cutey Honey F)
[Underground Dou (Stranger)] Jigoku Ezu no Yoru 2
Sorcerer Rubedo-kun
[TLG (bowalia)] Chika Tougijou Sen - Underground Colosseum Sen 5 [Chinese] [沒有漢化] [Digital]
(C88) [Lithium (Uchiga)] Again #2 "Flashback Memories" (God Eater)
(C95) [Kuma-tan Flash! (Kumao Mofumofu)] BB Jealousy (Fate/Grand Order)
From The Underground
(COMIC1☆10) [Kuma-tan Flash! (Hanao.)] Nee-sama no Inai Chinjufu (Kantai Collection -KanColle-)
(C82) [Kuma-tan Flash! (Hanao.)] 2010-2011 Matome Bon 2 (Touhou Project)
NAJICA FLASH
Futari no Nichiyoubi
Underground wrestling
Hitsugi
(C75) [Dakimakuma, Jingai Makyou Club (WING☆BIRD)] CHARA EMU W☆BR005 FLASH BACK Uruwashi no Mama P01 (Various)
[Studio Z-Agnam (Azuma Kyouto)] HONEY FLASH! 1 (Cutey Honey)
[Nakamura Yukitoshi] Underground Athlete Maker (2D Comic Magazine Kikaikan Ningen Bokujou Vol. 2) [English] [Digital]
Lost Desired
Sofia-san wa Kashikoi ♥
Vtuber Sokuhame Kairaku Ochi Hon 2
(C78) [Kuma-tan Flash! (Hanao.)] Moto Souryo no Nikuyoku Seppou - C78 Omake Bon (Touhou Project)
(Reitaisai 7) [Kuma-tan Flash! (Hanao)] Mebius:loop+Omake (Touhou Project) [English] [DesuDesu]
(Reitaisai 11) [Kuma-tan Flash! (Hanao.)] concern (Touhou Project)
Slut Kitty
(C81) [Kumatan Flash!] Futo-chan Ijimetai (Touhou Project)
(Reitaisai 6) [Kuma-tan Flash! (Hanao)] Scarlet (Touhou Project)
(C45) [Meirei Denpa (Various)] Meirei Denpa Shuuchuuchiryou (Various)
[Undergroundou] Tonde Hi ni Iru Natsu no Fundoshi Shounen
[GENOCIDE (Hattori Gorou)] S4U spats forever The UNDERGROUND insert SATONAKA CHIE (PERSONA 4) [Digital]
(Reitaisai 12) [Kuma-tan Flash! (Nishimura Nike)] Remilia to Fushigi no HiAce | A Simmer of Remilia With a Mysterious HiAce (Touhou Project) [English]
Koinyoubou Somewake Tazuna
(C96) [SILENT HILL (Morisoba)] NOT JAP (Deep Web Underground) [English] {Hennojin}
(C83) [Kuma-tan Flash! (Hanao.)] Mebius:gate (Touhou Project)
(C66) [Pon'yori Densetsu (Eririn)] Sekai no chushin de hanifurasshu | Honeyflash in Centre of the World! (Cutey Honey)
(C74) [FLASH POINT (Aoi Takayuki)] 《0》