
http://www.mangago.zone/read-manga/akai_ito_no_shikkou_yuuyo/nmt/tr_chapter-5.6/pg-8/
It looks like the seme was scratching uke's penis. It looks painful. Σ(  ̄□ ̄||)

Let's think it as drawing mistake.
ヽ( ̄∇ ̄")
I don't know the difference between the two?
Oh I see. Thank you!