ChatGPTで描く「夏の始まり」｜プロンプト6選【画像生成AI / AIイラスト / AIアート / AI活用 / GoogleGemini】

おはようございます！Kinuです。 遊びに来てくださり、ありがとうございます✨

本日は、ChatGPT Images 2.0を使って「夏の始まり」をテーマにしたイラストとプロンプトを創作してみました。少し季節を先取りして、ノスタルジックで爽やかな空気感をお届けします。

今回のプロンプトは、NanoBananaなど他の画像生成AIでもそのまま使える構造で設計しています！

同じ「言葉」を入力しても、AIツールが変われば「解釈」や「表現の個性」がガラッと変わるのが面白いところですよね。
ぜひ、ツールごとの違いを楽しむ実験としてもご活用くださいませ✨

【プロンプト集はこちらから】

【ChatGPTの画像の編集機能について】

◆オススメのプロンプト6選

①夜の川辺に咲く、夏の花

Nostalgic pastel editorial anime illustration.
A young woman in a modern, muted yukata stands on stepping stones across a calm river, looking up at the night sky.
Full body shot, 9:16 aspect ratio.
She watches a massive, blooming firework above, her face illuminated with a gentle, awestruck expression.
Color palette: Midnight Indigo (night sky and water), Vibrant Magenta (fireworks), Warm Gold (glowing lanterns), Soft White (highlights).
Background: Perfect vertical symmetry, with the radial bursts of fireworks mirrored flawlessly on the dark river surface.
Soft pastel bloom from the intense light of the fireworks and scattered floating lanterns.
Mood: Fleeting summer memories, emotional climax, timeless Japanese beauty.

②浴衣姿で感じる夏の気配

(masterpiece, best quality, highly detailed anime illustration), high-fashion editorial city pop anime poster style, 9:16.
Strictly limited color palette:
Vermilion Red, Leaf Green, Sunlight Gold, Porcelain White skin tone.
1girl, full body shot.
A young woman in a light summer yukata stands mid-step on stone shrine stairs, holding a paper fan loosely at her side, looking upward through the torii gates.
Background:
repeating torii gate silhouettes forming strong vertical rhythm,
contrasting with scattered organic leaf shadows.
Lighting:
intense dappled sunlight filtering through trees,
sharp light patches vs deep shadow.
Mood:
quiet reverence, summer stillness, nostalgic pause in everyday life.
No text.

③夏の思い出とカメラ

Nostalgic pastel editorial anime illustration.
A young woman in a retro summer school uniform stands at the edge of a sparkling, half-filled outdoor school swimming pool.
Full body shot, 9:16 aspect ratio.
She holds a vintage disposable camera up to her eye, capturing the blinding early summer sky with a bright, nostalgic smile.
Color palette: Pool Aqua (water), Pure White (clouds and uniform shirt), Sunburst Yellow (sunlight accents), Soft Peach (skin).
Background: Graphic, repeating horizontal lines of the pool lanes contrasting with the vast, empty sky.
Soft pastel bloom from the intense sunlight bouncing off the rippling water.
Mood: Youthful exuberance, Heisei school days, the dazzling start of summer.

④入道雲とバス停

Nostalgic pastel editorial anime illustration.
A young woman waits at a sun-drenched, uncovered rural bus stop, a giant, towering cumulonimbus cloud dominating the sky behind her.
Full body shot, 9:16 aspect ratio.
She leans against the faded signpost, listening to wired earphones connected to a translucent MD player, gazing upward with a hopeful, refreshed expression.
Color palette: Deep Azure (summer sky), Fluffy White (massive cloud), Sunflower Yellow (bus stop sign), Soft Lavender (shadows).
Background: An overwhelming scale contrast between the tiny bus stop and the massive, expanding fractal shapes of the summer cloud.
Soft pastel bloom from the bright, unfiltered early summer sky.
Mood: Boundless anticipation, rural Heisei escape, the sheer energy of summer.

⑤レトロ商店街で夏の影

(masterpiece, best quality, highly detailed anime illustration), high-fashion editorial anime poster style, 9:16.
Strictly limited color palette:
Retro Orange, Faded Blue, Cream White, Porcelain White.
1girl, full body shot.
A young woman stands under a covered shopping street, holding a small shopping bag, pausing mid-step.
composition:
framed through hanging shop banners and signs,
foreground elements partially obscuring edges,
Background:
repeating storefronts receding into depth,
layered signage rhythm,
Lighting:
soft diffused light filtered through arcade roof,
Mood:
daily life nostalgia, subtle loneliness, urban warmth.
No text.

⑥ラムネと扇風機

Nostalgic pastel editorial anime illustration.
A young woman sits cross-legged on a tatami mat next to an open sliding glass door, a retro blue-bladed electric fan oscillating nearby.
Full body shot, 9:16 aspect ratio.
She holds a glass bottle of Ramune up to the light, watching the glass marble inside with a mesmerizing, lazy summer smile.
Color palette: Tatami Green (floor), Ramune Blue (bottle and fan blades), Warm Gold (incoming sunlight), Soft White (clothing).
Background: Strict geometric framing provided by the wooden sliding doors (shoji/fusuma) opening out to a bright, blown-out summer garden.
Soft pastel bloom from the intense exterior light refracting through the glass bottle.
Mood: Lazy summer afternoons, Heisei childhood memories, comforting domestic stillness.

◆最後に

最後までご覧くださり、ありがとうございました！ 6つの「夏の始まり」、皆さんはどの情景が一番お好みでしたか？

ぜひ今回のプロンプトをコピーして、ご自身のAIツールで「あなただけの夏」を描き出してみてくださいね。少し色やアイテムの指定を書き換えてみるのもおすすめです！

それでは、今日もあなたにとって素敵な一日になりますように✨