1998 K3500 Dually Opti

[Optimist] R.O.H (Ragnarok Online)

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

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

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

COMIC Tenma 1998-10

[fulloption] Demongirl vore

SerizawaYuji-Program a Side 1998-4

(SC49) [Katsuobushi (Horie)] Tsukuyo-san ga Iyarashii Koto o Sarete Shimau Hanashi -NTR Ryoujoku Hen- [English] [Twilight Sparkle1998]

(HaruCC22) [Optimism small country (Haruto)] Shino wa Wakatte Kurenai (Mobile Suit Gundam Tekketsu no Orphans)

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

[Chuuka Naruto] Gichichi - An Adoptive Father [English] [SaHa]

Shinsekinchi no 1998-nensei

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

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

COMIC Papipo Gaiden 1998-09 Vol.50

COMIC Tenma 1998-12

COMIC Mate 1998-01

An Adoptive Father1 - Erotic Focus

Nikaido, Bentou ni Ura Option o Tsukeru

Tech Gian Issue 16 (February 1998)

Sutabaa no Ura Menu

[Paja] Option (ANGEL Club 2003-02) [English] [Amoskandy] [Decensored]

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

(C55) [Mutekei-Fire (Yuuichi)] Sekai Uki-Uki Daizukan 1998-nendo Ban - The Great Pictorial Guide of 'Uki-Uki' in the World '98 Edition (Various)

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

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

Fuuki Iinchou Odosare Ura Option ~Fukujuu no Inmon~

COMIC Penguin Club Sanzokuban 1998-12

(C55) [Hotateya (James Hotate)] Doki * 2 Syndrome 1998 Win (Super Doll Licca-chan)

Kaiun Miracle Positive Option

Ura Option Onegaishimasu.

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

COMIC Papipo Gaiden 1998-03

COMIC Papipo Gaiden 1998-05

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

1998

[Kumano Tooru] Shikareretakute, Ikenaiko | Bad girl who loves to get scolded (COMIC Penguin Club 2018-11) [English] [Shippoyasha] [Digital]

[Yamamoto Kenji] Tenshi no Option

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

BugBug 1998-10

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

[Hissatsukun] URA Option (ANGEL Club 2015-07) [Chinese] [最愛路易絲澪漢化組]

[Chuuka Naruto] Gichichi - An Adoptive Father

[Mamagult (Takao Ukyou)] Mamagult Katsudou Houkokusho Hikae 1997/11-1998/08 (Various)

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

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

COMIC Papipo 1998-08 [Incomplete]

Tech Gian 017 (March 1998)

COMIC Colorful Bee 1998-12

[Anthology] Pai;kuu 1998 August Vol. 12

【南方姑娘】-私人画家

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

[Muroi] Kissa Lycolyco Ura Option [Kanzenban] (Lycoris Recoil)

Tech Gian 016 (February 1998)

Pai;kuu 1998 October Vol. 13

Tech Gian Issue 15 (January 1998)

COMIC YOUNG HIP 1998-06

[Nakayohi (Izurumi)] EN (Neon Genesis Evangelion, Fushigi no Umi no Nadia) [1998-04-04]

COMIC Zero-Siki No.4 1998-04

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

[Kei] Zutto sumoopu no tān!! (Kei)

COMIC Tenma 1998-11

Super Optimistic Nyan Nyan

Mamagult Katsudou Houkokusho Hikae 1997/11-1998/08

[Inspire] Inspire Works 1998

Ketsuekigatabetsu Option

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

[Po-Ju] PO-JU WORKS - Po-Ju Shota Shougyoushi Zensakuhinshuu 1998-2009

[Anthology] Pai;kuu 1998 October Vol. 13

COMIC Papipo Gaiden 1998-02

Kimi wa Tomodachi 2

(C55) [Hotateya (James Hotate)] Doki Doki Syndrome 1998 Win (Dokkiri Doctor)

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

Love Option

Hentai Optics

[fulloption] Demongirl vore

[Anthology] Pai;kuu 1998 July Vol. 11

(CR39) [CIRCLE OUTERWORLD (Chiba Shuusaku)] Akibon (Kochikame) [English] {Twilight Sparkle1998}

Ura Option

[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]