Some said:
One thing is till don't understand after rereading chapter 26 we are made aware his first time doing anal was with beom in chapter 49 we see he was attacked by the royal dude and it says my virtue aka chastity remained in tact but then in 52 the royal guy says why are you worried ill rape him again and I checked in the raws the Korean word used is for rape
He don't believe he witnessed the prince beating lord ahn, just the aftermath, so he doesn't know for sure whether he raped him or not I guess
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Taming the Tiger