That would make total sense. The author said Muyeol likes control, and Yechan confessing, and to another guy of all people is something he definitely cannot imagine nor control.
When I reread chapter 38 I realized the reason why he wished for Seokjun to only get hard around him was because Yechan told him he lost to a dick (Seokjun’s) and then when he tried to get Seokjun hard, he couldn’t and Seokjun told him he could only get hard for Yechan , so bam! His control freak nature kicked in and now they’re in this predicament.

my prediction: there is gonna be some kinda 3some bc muyeol's condition for the end of his wish is to have sex with one of them but neither of them would be willing to let the other sleep with muyeol solo and this is somehow the catalyst for both seokjun and chani to realize each other's feelings or for yechan to get his dick back.