I can see that, but I feel like that matches his freak in a way. Matching someone's freak doesn't mean you act the same as they do. (Idk if it's over but let's say this story progresses and ML's possessiveness is an issue or gets brought up) I hope that mc doesn't just brush it off like he did with the photos or gets nervous from it and it's revealed that he actually loves it.
Honestly, I feel like he would be the type to be giggling and kicking his feet at the ML's possessiveness. Only if he took like... five seconds to stop, ask questions or maybe THINK about ML's behavior but we'll see lmao! (maybe...??)

Will the MC step up and match the ML red-flag-freak or nah. I need to know.
Also, anyone have any suggestions for red-flag yaoi mangas that match each others freak... aside from Roses and Champagne?... And Jealousy (DON'T get me started)