1枚目
1girl, male focus, solo, short hair, brown hair, long waist, narrow waist, brown eyes, sleeveless dress, white one-piece dress, V-neck dress, sitting, one piece bangs, hair between eyes, elegant, upper body, facing camera, standing, focused, feminine outfit, chest emphasis, cleavage, collarbone, detailed background, inside cafe, daytime, (hands on own hip:1.8)

2枚目
1girl, solo, short hair, brown hair, long waist, narrow waist, brown eyes, sleeveless dress, white one-piece dress, V-neck dress, sitting, one piece bangs, hair between eyes, elegant, upper body, facing camera, standing, focused, feminine outfit, chest emphasis, cleavage, collarbone, detailed background, inside cafe, daytime, (hands on own hip:1.8)

2枚目のように脇と胸の境目にできるしわが気に入らないので・・・
状況に合わせて「1girl, male focus,」このプロンプトを使っています。
加えて肩の骨格が健康美を強調してくれる効果も出やすいです。
少しでも参考になれるなら幸いです。