1998 K3500 Dually Opti

[Nakayohi (Izurumi)] Nyannyan (Neon Genesis Evangelion) [1998-02-08]

[Chuuka Naruto] Gichichi - An Adoptive Father

[Essentia] Side3.0 1998 Winter I's

(Reitaisai 4) [Web Knight (Knight Satoshi)] Optimal Optimum (Touhou Project)

【南方姑娘】-私人画家

(C78) [May no tenshi (Neyuki Rei)] brand-new Optique Girl (Original)

COMIC Kairakuten 7.1998

COMIC Papipo Gaiden 1998-07

[fulloption] Demongirl vore

[fulloption] Lamia vore (English)

[Farg] Taki Mitsu Yotsu: Gradually collapse (Kimi no Na wa.) [Chinese]

DENGEKI INUOH 1998 SUMMER

[Mutou Tetsu] Hai wa Hai ni (COMIC Papipo 1998-07)

Comic Papipo 1998-12 [Incomplete]

[Light Rate Port Pink] Saimin SEX Dorei -AKANE- | Hypno SEX Slave -AKANE- (Ranma 1/2) [English] [Optitron]

(SC58) [Katsuobushi (Horie)] Tsukuyo-san ga Iyarashii Koto o Sarete Shimau Hanashi 3 (Gintama) [English] [Twilight Sparkle1998]

[Umino Sachi] Aibou | Love Partner (Action Pizazz SP 2008-08) [English]

[Uesugi Kyoushirou] Fuuki Iinchou Odosare Ura Option ~Fukujuu no Inmon~ (ANGEL Club 2016-04) [English]

Kaiun Miracle Positive Option

COMIC YOUNG HIP 1998-06

[Anthology] Pai;kuu 1998 October Vol. 13

(SC54) [Katsuobushi (Horie)] Tsukuyo-san ga Iyarashii Koto o Sarete Shimau Hanashi 2 (Gintama) [English] [Twilight Sparkle1998]

[Inspire] Inspire Works 1998

(C75) [Przm Star (Kamishiro Midorimaru, QuanXing)] Optical Storm (Valkyrie Profile)

Sinsekinnoie 1998nensei

Nikaido, Bentou ni Ura Option o Tsukeru

Ura Option Onegaishimasu.

SerizawaYuji-Program a Side 1998-4

(C84) [Take Out (Zeros)] Optimization -Saitekika- (Toaru Kagaku no Railgun)

Roriura Tanuki no Kayazan'you | The over-optimistic back alley tanuki's miscalculation

Hentai Optics

[Naedoko (Koucha Kinoko)] LYRICAL OPTION VIRTUAL EMOTION! (13 Sentinels: Aegis Rim) [Digital]

(C88) [Kasshoku Waisei (YANAGI)] Shiru no Nominokoshi wa Genkin Desu. | Swallowing Is Not Optional. [English] [alparslan]

(C54) [Koa (Various)] DENGEKI INUOH 1998 SUMMER (Various)

Comic Papipo 1998-07

Gichichi - An Adoptive Father

[Shikishiro Konomi] Netoraserare | 虛假的寢取 Ch.1-27 [Chinese]

(COMIC1☆10) [Kaokuba (Shinyashiki)] Hentai Optics (Granblue Fantasy)

Zutto sumoopu no tān!!

[OptionalTypo] Team Building (Little Witch Academia)

BugBug 1998-10

An Adoptive Father1 - Erotic Focus

(RTS!!5) [Optimism small country (Horikiri Haruto)] Mousou Kisei Jijitsu (Haikyuu!!)

COMIC PINE 1998-07

[Optimism small country, FrancDoll (Horikiri Haruto, Naba Chuuta)] Himitsu no sexual harassment - Secret sexual harassment (Sengoku Basara)

[Machino Henmaru] Hotaru (COMIC Alice Club 1998)

Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-9

Blood type option

COMIC Mate 1998-01

SerizawaYuji-Program a Side 1998-4

[Hissatsukun] Ura Option (ANGEL Club 2015-07) [English] [TripleSevenScans]

(C76) [May no Tenshi (Neyuki Rei)] Optique-Girl 2

[LUCK&PLUCK!Co. (Amanomiya Haruka)] Tokyo Moulin Rouge (Ah! My Goddess) [1998-06-30]

[Fulloption] P.E. wareouse Vore

Nikaido, Bentou ni Ura Option o Tsukeru

(CR24) [bolze. (rit.)] Nov. 3rd 1998 no idea

Tech Gian 017 (March 1998)

[Umino Luka] Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-3,5-9 [cqxl自己汉化] [Digital]

(C86) [Renainou (Mizuyuki)] Shinsekinchi no 1998-nensei [Chinese] [无毒汉化组]

COMIC Tenma 1998-06

[Yamamoto Kenji] Tenshi no Option

Tech Gian Issue 25 (November 1998)

COMIC Papipo Gaiden 1998-03

An Adoptive Father3 - Evil Guys

【大小奶】-私人画家-中文

Manga Erotopia 1998-10

COMIC Zero-Siki No.4 1998-04

Taki Mitsu Yotsu: Gradually collapse

COMIC Tenma 1998-12

COMIC Penguin Club Sanzokuban 1998-11

[Hissatsukun] Ura Option (ANGEL Club 2015-07) [English] [TripleSevenScans]

[Essentia] Side2.0 1998 Summer

Ura Option

[Hanamizawa Q tarou] Honey Blue (1998-08-01)

(C86) [Renainou (Mizuyuki)] Shinsekinchi no 1998-nensei [Chinese] [无毒汉化组]

(CR35) [Kensoh Ogawa (Fukudahda)] Super Optimistic Nyan Nyan (R.O.D THE TV)

(Futaket 11) [Mayakasiya (Igusa Shunrou)] Optional Parts (Dr. Slump)

[Ankoman] Nikaido, Bentou ni Ura Option o Tsukeru (Dorohedoro)

COMIC Papipo Gaiden 1998-02

[Charlie Nishinaka] Cheers! 4 [English] [SaHa]

[LBL] The Pushover Adoptive Mother Lolibaba

(Noiji Maniacs 2) [Sarurururu (Doru Riheko)] 1998 (OS-tan)

(C89) [Optimism small country (Horikiri Haruto)] Sutabaa no Ura Menu (Osomatsu-san)

An Adoptive Father5 - Path of Beasts

Sutabaa no Ura Menu

An Adoptive Father6 - Black Hide Lust

COMIC Papipo Gaiden 1998-05

Kimi wa Tomodachi 2

Super Optimistic Nyan Nyan

COMIC Papipo 1998-08 [Incomplete]

[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]

COMIC RISE 1998-08

(C54) [Peace Maker (E=MC2)] COLOR WORKS 1987-1998

COMIC Tenma 1998-11

[WAKO] Endless (Mist Magazine: May 1998) [English] [Lililicious]

[Shikkokuno J.P.S. (Maruyama Kei, Hasumi Elan)] Black Beauty 1998 (Sentimental Graffiti, With You, Card Captor Sakura)

(C87) [Optimism small country (Horikiri Haruto)] Oishii Milk no Shiborikata (Haikyuu!!)

Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-6

COMIC Kairakuten 10.1998

(C90) [Optimism small country (Haruto)] Soccer-Bu no Yoshida-kun (Haikyuu!!)

COMIC Papipo Gaiden 1998-09 Vol.50

Mamagult Katsudou Houkokusho Hikae 1997/11-1998/08

Pai;kuu 1998 October Vol. 13

Mist Magazine(Ladies Comics) (1998)

optimistic bunny

COMIC Penguin Club Sanzokuban 1998-12

[Umino Luka] Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-6 [Digital]

妄想既成事実

Tech Gian 016 (February 1998)

COMIC Natural High Vol.31 1998-03

Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 1-3,5-9

[Iruma Kamiri] ENTREATY (COMIC Papipo 1998-06)

COMIC Tenma 1998-10

Erosugiru Tokoya no Obasan ~Otona no Option wa Ikaga? 7

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

Love Option

[Anthology] Pai;kuu 1998 August Vol. 12

(COMIC1☆3) [May no Tenshi (Neyuki Rei)] Optique-Girl