(Underground Carnival) [Kougeki (Ootsuki Wataru)] Speechless (Touhou Project)

[Underground Dou (Stranger)] Jigoku Ezu no Yoru 2

[Underground Dou] NOPOR

[Underground dou] Koushuu Benjo Shounen

(Reitaisai 8) [French letter (Fujisaki Hikari)] Pedolia! underground (Touhou Project)

(C78) [Crazy9 (Ichitaka)] Alice in Underground (Ookami-san to Shichinin no Nakama-tachi) [English] {doujin-moe.us}

(C78) [bolze. (rit.)] The Sunshine Underground (Heart Catch Precure)

(C71) [Kensoh Ogawa (Fukudahda)] Ashford Gakuen Underground (Code Geass) [Decensored]

[C's cheese] ANAN Gango no Miko (Tokyo Underground)

[Red Ribbon Revenger] Valhalla ~Joshou~ (Tokyo Underground & Spiral)

[Nanase Makoto] Chika Ryuushutsu - Leaked to Underground

[Fractal Underground Studio] Himitsu no Basho | Secret Place [English] [SaHa]

(C71) [Kensoh Ogawa (Fukudahda)] Ashford Gakuen Underground (Code Geass)

[Zokubutsu.zip (Asuka)] Zokubutsu.zip (9) Chika | Underground [English] [Digital]

[TLG (bowalia)] Chika Tougijou Sen - Underground Colosseum Sen 5 [Digital]

[TLG (bowalia)] Chika Tougijou Sen - Underground Colosseum Sen 5 [Chinese] [沒有漢化] [Digital]

[TLG (bowalia)] Chika Tougijou Sen - Underground Colosseum Sen 4 [Digital]

[TLG (bowalia)] Chika Tougijou Sen - Underground Colosseum Sen [English] [Sexy Akiba Detectives] [Digital]

[Unknown] Chika Teien | Underground Garden [Chinese]

[Shiruka Bakaudon] Uramono Zasshi No Fan Wa Yahari Orokamono De Aru | Fans of Underground Magazines are Truly Fools (COMIC Mate Legend Vol. 15 2017-05)[Chinese] [沒有漢化]

(Osuket 2) [UNDERGROUND CAMPAIGN (Senga Migiri, jin)] Yasei

(C83) [Tricot (Stella.Ing)] From The Underground (The Legend Of Zelda) [English] =SW=

[Fractal Underground Studio] Kodomo Rakuen Ransel Shoujo Hen

(C87) [Yamaneko Jinja (John Inu)] Journey Into Underground (Touhou Project)

(C86) [Gekidoku Shoujo (ke-ta)] Underground Blossom (Touhou Project)

[GENOCIDE (Hattori Gorou)] S4U spats forever The UNDERGROUND insert SATONAKA CHIE (PERSONA 4) [Digital]

[RED RIBBON REVENGER (Makoushi, Takatoo Juna)] Shiro (Spiral, Tokyo Underground)

(Underground Carnival) [Inyu-goya (Inyucchi)] Chitei no Yakata no Aigan Shoujo (Touhou Project)

(C78) [Crazy9 (Ichitaka)] Alice in Underground (Ookami-san to Shichinin no Nakama-tachi)

[Fractal Underground Studio] Pantsu Kuronikuru

[Ribonatsu] G (Tokyo Underground)

(C71) [Kensoh Ogawa (Fukudahda)] Ashford Gakuen Underground (Code Geass) [English] [0405]

(C71) [Kensoh Ogawa (Fukudahda)] Ashford Gakuen Underground (Code Geass) [English] [Decensored]

(C62) [C's cheese (Hebimaki Qto)] Nibun no Ichi no Gimai (Tokyo Underground)

(C71) [ARESTICA, D.N.A.Lab. (Ariko Youichi, Miyasu Risa)] Velvet Underground (Sumomomo Momomo)