What with that Actors and ML relationship ??

Ex-situationship. Very casual and no hard feelings. Spoilers below
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The author shares in the translated season finale note that when the actor realized the ml had feelings for the MC, he lost interest in the director and (from my observations) is antagonizing him in a playful way. Ish. I view it as him trying to help both of them (and you can see him help the mc handle the director)