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You see how the ML in manhwa stated below behaves in chapter 8, yeah that's basically Jigu in the future.
https://www.mangago.zone/read-manga/the_best_luck_of_my_life/
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Both similar behaviours were present in Jigu's action. In about two chapters in the raw he will stole a kiss from Yeowoon when he's asleep(cause yknow f*ck consent). And when Jigu confessed his feelings, he will threatened to off himself if Yeowoon rejected him . Jigu is, at the core, an immature childish brat similar to the ML of the manhwa which I link above.
But he do get character development later on near the end of the series and in side stories. This is why novel readers were being especially vague about the confession and reciprocation part in the novel.
novel readers are being vague as hell but tell me this — is what's about to happen reciprocated?? bc we know yeowoon is straight (until proven other wise) so is there gonna be a dramatic shift in thought or a heavy double down??