Actually, he saw a hickey on the uke's neck.... which is caused by the seme during their love making, so he was shocked who he was meeting up with aside from him... And just to tell you, he's really possessive...
SPOILER ALERT:Actually, he saw a hickey on the uke's neck.... which is caused by the seme during their love making, so he was shocked who he was meeting up with aside from him... And just to tell you, he's real... Parsley
He intentionally put the hickey on the uke when he took the uke home it's for the brown haired guy to see it. It wasn't when their making love.
Ooo I'm so curious, what did the brown haired guy see, to make him glare like that