Min likes the Ginger haired at this point in time. He did confess to black hair (ML) in highschool, but after being rejected, Ginger hair (MC) basically comforted him and started hanging out together. That's when he developed feelings for MC, but was too afraid to confess in case it ruins their relationship, plus he didn't think MC was into guys.
I think because Min was defensive towards ML over MC, that they thought this was because Min still had a crush on ML, which he doesnt

I'm just reading this but am confused, who does Min (Pink Haired) like? He confessed to ML back in highschool and now he hangs out with MC every Monday before MC met ML again. I'm curious