It's quite a weird request but I want to see C-dramas where a male supporting character has a secret crush on the female lead, like you can tell he likes her. The male supporting character is not the male lead nor is he the second male lead, if there is one. There has to be enough scenes for the two of them together, it's okay if other characters are present in the frame as well and they don't really interact much. Though I do prefer to see enough interactions between them and him not being entirely invisible to the FL.
He doesn't actively chase after her nor does he try to but his glances and minor actions tells that he cares for her and likes her.
I want to see this situation because in Renascence, there was a subplot that got cut where the male supporting character (Han Jin Yi) who works for the ML (Prince Su) actually liked the FL but couldn't do anything about it because of the situation. He wasn't the ML or SML.