I was reading old chapter and read chapter 32 seme had same reaction like when he got call from his mother he became angry and try to force himself on uke but then stop himself.....so i think it's his way of taking out frustration or anger by sexually abusing other people because he want them to beg while being sexually pleased......idk ( ̄へ ̄)
But now i want to know his reason for trauma and why he is so much in BDSM
Since seme is not in good state right now i think we will see some hard core stuff.... I think first seme will lose control then later try to comeback to his old cute self