【考察】ボーイズラブ画像生成

# 1.はじめに

この記事では、ボーイズラブ画像の生成方法を考察していきます。

ボーイズラブを直接的に表現する「yaoi」（Danbooruタグにおけるボーイズラブ作品の意味。男の娘ジャンルも含まれる。ゲイ作品の場合は「bara」になる）をプロンプトに含めれば良いと言えばそうなのですが、これはなかなか扱いの難しい要素です。

この単語をプロンプトで強調した場合の効果としては、次のものを体感しています。

①男性同士の性愛の画像が生成しやすくなります。

②キャラクターがイケメン (bishonen, twink) になりやすくなります。

③攻め側も顔出ししやすくなります。

どれもボーイズラブ的には意図する効果なのですが、③の点は画像生成AI的に都合が悪いケースがあります。

攻め側も顔出ししやすくなるという事は、顔の見えない竿役 (faceless male)が生成されにくいという事でもあります。

顔が見える場合は、容姿に関わるプロンプトが攻め側にも適用されやすくなります。

そのため、攻め側と受け側で一貫性を保ちつつも、容姿の差別化をするのが難しくなります。

この課題に関して、対応策を検討していきます。

# 2.前提条件

■Mistoon_Anime [by Inzaniak]

https://civitai.com/models/24149/mistoonanime?modelVersionId=692489

# 3.生成例

①

```

score_9, score_8_up, score_7_up, otoko no ko, femboy, bishonen, twink,

2boys, yaoi, male/male,

anal penetration, reverse cowgirl position, carrying partner, leg grab, sitting,

blush, surprised expression, heavy breathing, panting,

anal juice, anal tugging, precum,

motion lines, speed lines, motion blur,

2 penises, penis size difference, balls,

small penis, micropenis, foreskin,

large penis, big penis, veiny penis,

interracial, white skin, black skin,

big dom small sub, height difference, age difference,

smaller male, young, slim, petite,

wolf ears, animal ear fluff, grey hair, messy hair, very long hair, hair intakes, sidelocks, brown eyes, completely nude,

larger male, mature, faceless male, muscular male, black hair,

forest background, on grass

Negative prompt: tail, score_4, score_3, score_2, score_1, source_pony, source_furry, source_cartoon, western comics \(style\), signature, watermark, logo, web address, missing toes, 4toes, bad foot, bad hand, extra fingers, extra anus, extra pussy, extra legs, extra foot, censored, mosaic censoring, bar censor, braces, long torso, border, black border, white border

```

②

```

score_9, score_8_up, score_7_up, otoko no ko, femboy, bishonen, twink,

2boys, yaoi, male/male,

anal penetration, doggystyle, butt grab, shoulder grab, all fours,

blush, heavy breathing, panting, open mouth,

anal juice, precum,

motion lines, speed lines, motion blur, sweat,

2 penises, penis size difference, balls,

small penis, micropenis, foreskin,

large penis, big penis, veiny penis,

interracial, white skin, black skin,

big dom small sub, height difference, age difference,

smaller male, <年齢タグS>, slim, petite,

wolf ears, animal ear fluff, grey hair, messy hair, very long hair, hair intakes, sidelocks, brown eyes, big eyes, completely nude,

larger male, mature, faceless male, muscular male, black hair,

forest background, on grass

Negative prompt: tail, score_4, score_3, score_2, score_1, source_pony, source_furry, source_cartoon, western comics \(style\), signature, watermark, logo, web address, missing toes, 4toes, bad foot, bad hand, extra fingers, extra anus, extra pussy, extra legs, extra foot, censored, mosaic censoring, bar censor, braces, long torso, border, black border, white border

```

③

```

score_9, score_8_up, score_7_up, otoko no ko, femboy, bishonen, twink,

2boys, yaoi, male/male,

anal penetration, deep penetration, doggystyle, butt grab, shoulder grab, all fours,

blush, anal orgasm, heavy breathing, panting, open mouth,

anal juice, precum,

motion lines, speed lines, motion blur, sweat,

2 penises, penis size difference, balls,

small penis, micropenis, foreskin,

large penis, big penis, veiny penis,

interracial, white skin, black skin,

big dom small sub, height difference, age difference,

smaller male, <年齢タグS>, slim, petite,

wolf ears, animal ear fluff, grey hair, messy hair, very long hair, hair intakes, sidelocks, brown eyes, big eyes, completely nude,

larger male, mature, faceless male, muscular male, black hair,

forest background, on grass

Negative prompt: tail, score_4, score_3, score_2, score_1, source_pony, source_furry, source_cartoon, western comics \(style\), signature, watermark, logo, web address, missing toes, 4toes, bad foot, bad hand, extra fingers, extra anus, extra pussy, extra legs, extra foot, censored, mosaic censoring, bar censor, braces, long torso, border, black border, white border

```

④

```

score_9, score_8_up, score_7_up, otoko no ko, femboy, bishonen, twink,

cum inside, cross-section, x-ray, cutaway, speech bubble,

2boys, yaoi, male/male,

anal penetration, deep penetration, doggystyle, torso grab, all fours,

blush, anal orgasm, torogao, heavy breathing, panting, clenched teeth,

cum in ass, cum splatter, hands-free, ejaculation, excessive cum,

motion lines, speed lines, motion blur, sweat,

2 penises, penis size difference, balls,

small penis, micropenis, foreskin,

large penis, big penis, veiny penis,

interracial, white skin, black skin,

big dom small sub, height difference, age difference,

smaller male, <年齢タグS>, slim, petite,

wolf ears, animal ear fluff, grey hair, messy hair, very long hair, hair intakes, sidelocks, brown eyes, big eyes, completely nude,

larger male, mature, faceless male, muscular male, black hair,

forest background, on grass

Negative prompt: tail, score_4, score_3, score_2, score_1, source_pony, source_furry, source_cartoon, western comics \(style\), signature, watermark, logo, web address, missing toes, 4toes, bad foot, bad hand, extra fingers, extra anus, extra pussy, extra legs, extra foot, censored, mosaic censoring, bar censor, braces, long torso, border, black border, white border, hetero, pussy, vaginal, vagina, cameltoe, breasts, female, woman, girl, she, uterus, cervix, impregnation

```

⑤

```

score_9, score_8_up, score_7_up, otoko no ko, femboy, bishonen, twink,

cum inside, cross-section, x-ray, cutaway, speech bubble,

2boys, yaoi, male/male,

anal penetration, reverse stand and carry position, full nelson,

blush, anal orgasm, screaming, surprised expression, heavy breathing, panting, open mouth,

motion lines, speed lines, motion blur, sweat,

anal juice, anal tugging, precum,

2 penises, penis size difference, balls,

small penis, micropenis, foreskin,

large penis, big penis, veiny penis,

interracial, white skin, black skin,

big dom small sub, height difference, age difference,

smaller male, <年齢タグS>, slim, petite,

wolf ears, animal ear fluff, grey hair, messy hair, very long hair, hair intakes, sidelocks, brown eyes, big eyes, completely nude,

larger male, mature, faceless male, muscular male, black hair,

forest background, grass

Negative prompt: tail, score_4, score_3, score_2, score_1, source_pony, source_furry, source_cartoon, western comics \(style\), signature, watermark, logo, web address, missing toes, 4toes, bad foot, bad hand, extra fingers, extra anus, extra pussy, extra legs, extra foot, censored, mosaic censoring, bar censor, braces, long torso, border, black border, white border, hetero, pussy, vaginal, vagina, cameltoe, breasts, female, woman, girl, she, uterus, cervix, impregnation

```

⑥

```

score_9, score_8_up, score_7_up, otoko no ko, femboy, bishonen, twink,

cum inside, cross-section, x-ray, cutaway, speech bubble,

2boys, yaoi, male/male,

anal penetration, reverse stand and carry position, full nelson,

blush, anal orgasm, screaming, torogao, heavy breathing, panting, open mouth,

motion lines, speed lines, motion blur, sweat,

anal juice, anal tugging, precum,

2 penises, penis size difference, balls,

small penis, micropenis, foreskin,

large penis, big penis, veiny penis,

interracial, white skin, black skin,

big dom small sub, height difference, age difference,

smaller male, <年齢タグS>, slim, petite,

wolf ears, animal ear fluff, grey hair, messy hair, very long hair, hair intakes, sidelocks, brown eyes, big eyes, completely nude,

larger male, mature, faceless male, muscular male, black hair,

forest background, grass

Negative prompt: tail, score_4, score_3, score_2, score_1, source_pony, source_furry, source_cartoon, western comics \(style\), signature, watermark, logo, web address, missing toes, 4toes, bad foot, bad hand, extra fingers, extra anus, extra pussy, extra legs, extra foot, censored, mosaic censoring, bar censor, braces, long torso, border, black border, white border, hetero, pussy, vaginal, vagina, cameltoe, breasts, female, woman, girl, she, uterus, cervix, impregnation

```

⑦

```

score_9, score_8_up, score_7_up, otoko no ko, femboy, bishonen, twink,

cum inside, cross-section, x-ray, cutaway, cut-in,

2boys, yaoi, male/male,

anal penetration, reverse stand and carry position, full nelson,

blush, anal orgasm, screaming, fucked silly, heavy breathing, panting, open mouth,

motion lines, speed lines, motion blur, sweat,

cum in ass, hands-free, ejaculation, excessive cum,

2 penises, penis size difference, balls,

small penis, micropenis, foreskin,

large penis, big penis, veiny penis,

interracial, white skin, black skin,

big dom small sub, height difference, age difference,

smaller male, <年齢タグS>, slim, petite,

wolf ears, animal ear fluff, grey hair, messy hair, very long hair, hair intakes, sidelocks, brown eyes, big eyes, completely nude,

larger male, mature, faceless male, muscular male, black hair,

forest background, grass

Negative prompt: tail, score_4, score_3, score_2, score_1, source_pony, source_furry, source_cartoon, western comics \(style\), signature, watermark, logo, web address, missing toes, 4toes, bad foot, bad hand, extra fingers, extra anus, extra pussy, extra legs, extra foot, censored, mosaic censoring, bar censor, braces, long torso, border, black border, white border, hetero, pussy, vaginal, vagina, cameltoe, breasts, female, woman, girl, she, uterus, cervix, impregnation

```

⑧

```

score_9, score_8_up, score_7_up, otoko no ko, femboy, bishonen, twink,

2boys, yaoi, male/male,

after anal, oral penetration, fellatio, head grab, seiza, kneeling, sitting,

blush, ahegao, heavy breathing, panting, open mouth,

motion lines, speed lines, motion blur, sweat,

cum in mouth, cum splatter, hands-free, ejaculation, excessive cum,

2 penises, penis size difference, balls,

small penis, micropenis, foreskin,

large penis, big penis, veiny penis,

interracial, white skin, black skin,

big dom small sub, height difference, age difference,

smaller male, <年齢タグS>, slim, petite,

wolf ears, animal ear fluff, grey hair, messy hair, very long hair, hair intakes, sidelocks, brown eyes, big eyes, completely nude,

larger male, mature, faceless male, muscular male, black hair,

forest background, grass

Negative prompt: tail, score_4, score_3, score_2, score_1, source_pony, source_furry, source_cartoon, western comics \(style\), signature, watermark, logo, web address, missing toes, 4toes, bad foot, bad hand, extra fingers, extra anus, extra pussy, extra legs, extra foot, censored, mosaic censoring, bar censor, braces, long torso, border, black border, white border, hetero, pussy, vaginal, vagina, cameltoe, breasts, female, woman, girl, she, uterus, cervix, impregnation

```

# 4.考察

女性っぽさを下げた男の娘ジャンルを意図するプロンプトで、画像生成を試みています。

```

otoko no ko, femboy

←男の娘（Danbooruタグ、e621タグ）

bishonen, twink

←美少年（Danbooruタグ、e621タグ）

2boys

←男性二名（Danbooruタグ）

yaoi

←ボーイズラブ（Danbooruタグ）

male/male

←男性同士（e621タグ）

```

そして、対比構造のプロンプトによる受け攻めキャラ属性固定も利用します。（詳しくは下記の記事をご覧ください）

■【解説】対比構造のプロンプトによる受け攻めキャラ属性固定

https://www.fanbox.cc/@rarabeat/posts/8231225

【解説】対比構造のプロンプトによる受け攻めキャラ属性固定

1.はじめに この記事では、対比構造のプロンプトによる受け攻めキャラ属性固定を解説していきます。 竿役（攻め）とヒロイン（受け）の2名が登場する画像の生成において、単一のプロンプトにより両者の容姿を固定します。 そのために、プロンプトには次の要素を含みます。 ①体格が大きい方が攻めであること。 ②攻めは竿...

ただし、男女差というよりも体格差を意識します。

具体的に言うと、次の要素です。

```

penis size difference

←ペニスの大きさの差

small penis, micropenis

←小さなペニス、マイクロペニス

large penis, big penis

←大きなペニス（Danbooruタグ、e621タグ）

interracial, white skin, black skin

←異人種間、白い肌、黒い肌

big dom small sub

←大きな攻め、小さな受け

height difference

←身長差

age difference

←年齢差

smaller male, slim, petite

←小さめの男性、スリム、小柄

larger male, faceless male, muscular male

←大きめの男性、モブ竿役、マッチョマン

```

そして、上記以外のキャラ属性差分に関しては、髪色のみとしています。

```

grey hair

←灰色の髪

black hair

←黒色の髪

```

　※画像生成AIの傾向として、肌の色に近い髪の色が適用される傾向を感じています。

# 5.おわりに

ボーイズラブを代表とする女性向けエロジャンルは、愛欲的で、キャラクター同士の関係性を重要視する物語構成が多いと聞いています。

ただ、私はその辺りの知見が少ないため、分からないというのが正直な感想です。

この記事も「ボーイズラブ画像生成」と銘打っていますが、実態としては男の娘ジャンルでヒロイン♂側の女性っぽさを下げつつも一貫性を確保するためのアプローチを考えていた時の産物です。

あなたの創作における何らかのヒントとなっていれば、幸いです。

（おわり）