自分ならこんな感じ↓にする
(((masterpiece))),super fine illustration,
nsfw,solo focus,(pov:1.2),from below,
1girl,completely nude,
hetero,cowgirl position, girl on top,vaginal,
(leaning back:1.3), (arms behind back:1.1), arm support,
nipples, navel, pussy,
spread legs,