Suyeon was in his office, contemplating the next move. There was no doubt that Semin must have told Yoona about their conversation at the coffee shop. The latter was probably aware by now of Jinhyun's supposed feelings towards her.
If luck favored him, then Yoona caught the bait. However, if Yoona really was the stalker, then there was a chance that she would not fall into the trap so easily. The only way to convince her was to use Jinhyun. If they could conjure up a fake romance, Yoona might let her guard down and let them catch her in the act.
However, Suyeon had a feeling that Jinhyun would probably never agree to this plan. Not only was this going against his rules but if Suyeon was not wrong, Jinhyun was pursuing that red lady who was his partner at the company.