(CR24) [bolze. (rit.)] Nov. 3rd 1998 no idea
[LUCK&PLUCK!Co. (Amanomiya Haruka)] Tokyo Moulin Rouge (Ah! My Goddess) [1998-06-30]
[Iruma Kamiri] ENTREATY (COMIC Papipo 1998-06)
(C54) [Peace Maker (E=MC2)] COLOR WORKS 1987-1998
[Paja] Option (ANGEL Club 2003-02) [English] [Amoskandy]
[Fulloption] P.E. wareouse Vore
COMIC Papipo Gaiden 1998-03
Roriura Tanuki no Kayazan'you | The over-optimistic back alley tanuki's miscalculation
COMIC Papipo Gaiden 1998-09 Vol.50
[Hissatsukun] Ura Option (ANGEL Club 2015-07) [English] [TripleSevenScans]
[Option 5] Option 5 Vol. 01 (Various)
[fulloption] Lamia vore (English)
COMIC Penguin Club Sanzokuban 1998-11
[Optimist] R.O.H (Ragnarok Online)
[Hissatsukun] URA Option (ANGEL Club 2015-07) [Chinese] [最愛路易絲澪漢化組]
Tech Gian 015 (January 1998)
Hentai Optics
Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-6
[Anthology] Pai;kuu 1998 October Vol. 13
(SC54) [Katsuobushi (Horie)] Tsukuyo-san ga Iyarashii Koto o Sarete Shimau Hanashi 2 (Gintama) [English] [Twilight Sparkle1998]
COMIC Natural High Vol.31 1998-03
[Kei] Zutto sumoopu no tān!! (Kei)
Karada no Kankei Mocchatta Okaasan to Nashi Kuzushiteki ni Kodzukuri Hajimechatta Hanashi|Having a Physical Relationship with My Mother I Gradually Try to Make a Baby
Ura Option Onegaishimasu.
Tech Gian 026 (December 1998)
[Yamamoto Kenji] Tenshi no Option
Ura Option
Mamagult Katsudou Houkokusho Hikae 1997/11-1998/08
COMIC Papipo Gaiden 1998-05
Tech Gian 017 (March 1998)
[Uesugi Kyoushirou] Fuuki Iinchou Odosare Ura Option ~Fukujuu no Inmon~ (ANGEL Club 2016-04) [English]
[Essentia] Side2.0 1998 Summer
optimistic bunny
(C88) [Kasshoku Waisei (YANAGI)] Shiru no Nominokoshi wa Genkin Desu. | Swallowing Is Not Optional. [English] [alparslan]
Tech Gian 021 (July 1998)
(HaruCC22) [Optimism small country (Haruto)] Shino wa Wakatte Kurenai (Mobile Suit Gundam Tekketsu no Orphans)
Tech Gian Issue 15 (January 1998)
(C84) [Take Out (Zeros)] Optimization -Saitekika- (Toaru Kagaku no Railgun)
Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-3,5-9
[Umino Luka] Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-9(Complete) [cqxl自己汉化] [Digital]
Comic Papipo 1998-12 [Incomplete]
[Kumano Tooru] Shikareretakute, Ikenaiko | Bad girl who loves to get scolded (COMIC Penguin Club 2018-11) [English] [Shippoyasha] [Digital]
(C55) [Hotateya (James Hotate)] Doki Doki Syndrome 1998 Win (Dokkiri Doctor)
(RTS!!5) [Optimism small country (Horikiri Haruto)] Mousou Kisei Jijitsu (Haikyuu!!)
(C86) [Renainou (Mizuyuki)] Shinsekinchi no 1998-nensei [Chinese] [无毒汉化组]
An Adoptive Father5 - Path of Beasts
COMIC RISE 1998-08
(C89) [Optimism small country (Horikiri Haruto)] Sutabaa no Ura Menu (Osomatsu-san)
Kaiun Miracle Positive Option
[Umino Sachi] Aibou | Love Partner (Action Pizazz SP 2008-08) [English]
COMIC Papipo Gaiden 1998-07
(C76) [May no Tenshi (Neyuki Rei)] Optique-Girl 2
(C54) [Koa (Various)] DENGEKI INUOH 1998 SUMMER (Various)
COMIC Mate 1998-01
COMIC Penguin Club Sanzokuban 1998-10
(C89) [Optimism small country (Horikiri Haruto)] Sutabaa no Ura Menu (Osomatsu-san) [English] [Rapinii]
Gichichi - An Adoptive Father
[Optimism small country (Horikiri Haruto)] Jirettaikedo Ore ni Motto Te o Dashite Hoshii Nante Ienaidaro Daichi no Baka! (Haikyuu!!)
1998
SerizawaYuji-Program a Side 1998-4
Shiru no Nominokoshi wa Genkin Desu. | Swallowing Is Not Optional.
Sinsekinnoie 1998nensei
[fulloption] Demongirl vore
[Anthology] Pai;kuu 1998 July Vol. 11
COMIC Papipo Gaiden 1998-10 Vol.51
[Essentia] Side3.0 1998 Winter I's
[Umino Luka] Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-3,5-9 [cqxl自己汉化] [Digital]
Option
Manga Erotopia 1998-10
[Shikkokuno J.P.S. (Maruyama Kei, Hasumi Elan)] Black Beauty 1998 (Sentimental Graffiti, With You, Card Captor Sakura)
COMIC Kairakuten 7.1998
Tech Gian Issue 17 (March 1998)
[WAKO] Endless (Mist Magazine: May 1998) [English] [Lililicious]
[Mutou Tetsu] Hai wa Hai ni (COMIC Papipo 1998-07)
[Muroi] Kissa Lycolyco Ura Option [Kanzenban] (Lycoris Recoil)
COMIC Penguin Club Sanzokuban 1998-12
An Adoptive Father3 - Evil Guys
Fuuki Iinchou Odosare Ura Option ~Fukujuu no Inmon~
[Optimism small country, FrancDoll (Horikiri Haruto, Naba Chuuta)] Himitsu no sexual harassment - Secret sexual harassment (Sengoku Basara)
Loli Baba Ogibo-san wa Tottemo Oshi ni Yowai | My Adoptive Lolibaba Mom Is Very Easy To Push Around
[OptionalTypo] Team Building (Little Witch Academia)
COMIC YOUNG HIP 1998-05
COMIC YOUNG HIP 1998-06
(C90) [Optimism small country (Haruto)] Soccer-Bu no Yoshida-kun (Haikyuu!!)
Nikaido, Bentou ni Ura Option o Tsukeru
(SC58) [Katsuobushi (Horie)] Tsukuyo-san ga Iyarashii Koto o Sarete Shimau Hanashi 3 (Gintama) [English] [Twilight Sparkle1998]
(Noiji Maniacs 2) [Sarurururu (Doru Riheko)] 1998 (OS-tan)
[Fan no Hitori] Dolls -Anzai Rina Hen- | Dolls -Rina Anzai's Story- (Dolls) [English] [Optitron]
COMIC Tenma 1998-06
COMIC Papipo Gaiden 1998-01
[Farg] Taki Mitsu Yotsu: Gradually collapse (Kimi no Na wa.) [Chinese]
【南方姑娘】-私人画家
Ketsuekigatabetsu Option
COMIC PINE 1998-07
An Adoptive Father1 - Erotic Focus
[Jushoku to Sono Ichimi (Various)] Sakura ja Nai Moon!! Character Voice Tange Sakura (Cardcaptor Sakura, Sakura Taisen) [1998-10-10]
[Umino Luka] Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-6 [Digital]
[Po-Ju] PO-JU WORKS - Po-Ju Shota Shougyoushi Zensakuhinshuu 1998-2009
[Light Rate Port Pink] Saimin SEX Dorei -AKANE- | Hypno SEX Slave -AKANE- (Ranma 1/2) [English] [Optitron]
[Hanamizawa Q tarou] Honey Blue (1998-08-01)
Super Optimistic Nyan Nyan
(Futaket 11) [Mayakasiya (Igusa Shunrou)] Optional Parts (Dr. Slump)
An Adoptive Father7 - Exorcist Reika1
[Nakayohi (Izurumi)] EN (Neon Genesis Evangelion, Fushigi no Umi no Nadia) [1998-04-04]
An Adoptive Father2 - Dot And Rope
Kissa Lycolyco Ura Option
Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 7
COMIC Tenma 1998-10
Pai;kuu 1998 October Vol. 13
[Chavo Bantam (Torao)] Ura Option Onegaishimasu. (Kanojo, Okarishimasu) [Chinese]
[Chuuka Naruto] Gichichi - An Adoptive Father [English] [SaHa]
[Nakayohi (Izurumi)] Nyannyan (Neon Genesis Evangelion) [1998-02-08]
[Inspire] Inspire Works 1998
(C55) [Hotateya (James Hotate)] Doki * 2 Syndrome 1998 Win (Super Doll Licca-chan)
COMIC Tenma 1998-11
(COMIC1☆3) [May no Tenshi (Neyuki Rei)] Optique-Girl
COMIC Colorful Bee 1998-12
(CR34) [RYU-SEKI-DO (Nagare Hyo-go)] Optician (Various)
(SC49) [Katsuobushi (Horie)] Tsukuyo-san ga Iyarashii Koto o Sarete Shimau Hanashi -NTR Ryoujoku Hen- [English] [Twilight Sparkle1998]
DENGEKI INUOH 1998 SUMMER
(C55) [Mutekei-Fire (Yuuichi)] Sekai Uki-Uki Daizukan 1998-nendo Ban - The Great Pictorial Guide of 'Uki-Uki' in the World '98 Edition (Various)
(C86) [Renainou (Mizuyuki)] Shinsekinchi no 1998-nensei
Tech Gian 016 (February 1998)
Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-9
[Anthology] Pai;kuu 1998 August Vol. 12
(C87) [Optimism small country (Horikiri Haruto)] Oishii Milk no Shiborikata (Haikyuu!!)
COMIC Papipo Gaiden 1998-02
COMIC Tenma 1998-08
[Wakamatsu] Takuhaibin no Uketorikata ga Dandan Darashinaku Natte Iku OL-chan (+ Ura-hen) | A Woman Whose Greetings to the Delivery Man Gradually Get Sloppier (+ Other Side) [English]
Mist Magazine(Ladies Comics) (1998)
[Charlie Nishinaka] Cheers! 4 [English] [SaHa]
Kimi wa Tomodachi 2
[Paja] Option (ANGEL Club 2003-02) [English] [Amoskandy] [Decensored]
[Chuuka Naruto] Gichichi - An Adoptive Father
[Ankoman] Nikaido, Bentou ni Ura Option o Tsukeru (Dorohedoro)
COMIC Tenma 1998-07
(COMIC1☆10) [Kaokuba (Shinyashiki)] Hentai Optics (Granblue Fantasy)