Words without actions means nothing even if he truly likes Jooin, there's no point if he can't properly show it. If I need to choose one I would chose Cain, unlike Yahwi he can show the love he has for Jooin. But I also understand Yahwi at some point he was raised without love so that might be one of the reasons he can't express his feeling for Jooin well. On the end we just have to wait and see who would be with Jooin at the end.
Words without actions means nothing even if he truly likes Jooin, there's no point if he can't properly show it. If I need to choose one I would chose Cain, unlike Yahwi he can show the love he has for Jooin. But I also understand Yahwi at some point he was raised without love so that might be one of the reasons he can't express his feeling for Jooin well. On the end we just have to wait and see who would be with Jooin at the end.