「寝心地が良いかはわかりませんけど…」

なんか急に立ちくらみがした気がしたので早苗さんに膝枕してもらいたい。
スカート短めなのはふともも描きたかったからです。ふともも。

"I'm not sure if snuggling like this is okay, but..."

Suddenly, I'm all dizzy, so I want to use Sanae-san as a lap pillow.
The skirt's so short because I wanted to draw her thighs. Her thighs*.

(* This word, futomomo, usually means thighs, but can also be taken to refer to one's backside)