Guessing they used to fight each other and uke used to beat the seme in competitions and that’s where he got his love for seeing the seme in pain from maybe?
i hope its not that. and i dont think it is. but i DO think that blondie aka Lee knows buff boi aka Cha Jaehyun from earlier in their lives, like he's in some way alrdy familiar with Jaehyun but Jaehyun either never met Lee Sunjin before OR he did and forgot cause it wasnt a particularly memorable meeting for him. we'll see. maybe Lee just knows a good potential bottom bitch when he sees one. (i know i know he's not the Actual bottom but he is a sub so close enough~)
I think this is the first time I’ve read a yaoi where they sorted out sexual harassment properly without it being romanticised or ignored like it never happened and I’m living for it