Responses
The pupils are straight at us. If you think Jooin staring at him then basically saying yahwi end up with Cain because yahwi looking at Cain [with annoyance]. Yahwi accepted to let go because he realized he lost and there was nothing to do to make Jooin stay. Beside that Jooin been putting distance between them since chapter 38-39 if that doesn't say anything idk what will. How is Jooins "the wounds are deep and the trust is broken" hinting at yahwi as final ML?
Try looking at Jooins eyes from the cover photo, it literally points out who he will choose and who attracts him more. He already unleashed cain told him goodbye so cain is out of picture. Cut cain out