Ignorance is truly bliss.
When Lee Soohyun didn't know that Han Minhyun could see through her acting, she felt much at peace. Nonetheless, Minnie was right. It was not smart to expect that Han Minhyun won't be able to see through her.
Han Minhyun had more experience with people than her, and he regularly met up with people who would wear a mask on their face. Soohyun was not one of those who was an expert at changing expressions.
From the very beginning, Lee Soohyun's actions were suspicious from Han Minhyun's point of view. Soohyun didn't know why she never saw herself from Minhyun's point of view before. She had never messed up as much like how she did this time with Minhyun.
Moon Jiwoo expressed her love for Ahn Eunwoo loudly to the entire world, and all of a sudden, within less than a week— when Soohyun took over body— she changed her target to Han Minhyun. The arrogant, idiotic, and outspoken Moon Jiwoo changed to a docile and polite girl.
