Responses
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Jun already realized that in chapter 16. That's kind of why he's been so reluctant to fall for Subin.
Jun: "You were going to give it (the curry) to the guy you love like a stupid idiot but you got rejected like usual. And you were trying to satisfy yourself with me? You know, that makes me feel really shitty."
I can't bare the thought when kang jun finally realized that he was just a substitute even though he tried so hard to not fall in love with subin