First of all, episode 4 has the big revelation. Hyun Woo finally found out that his wife, Soo Yeon, is indeed having an affair! (Or so she said)

Hyun Woo caught the two at an elevator of a hotel. He talked to Soo Yeon and asked who the guy was and the guy lied that he was just a colleague of Soo Yeon's and that they were just going to the lounge. However, Hyun Woo found the room key so he knows the truth.  He confronted the two inside the room and asked Soo Yeon if they did was having an affair. Soo Yeon just said yes and them Hyun Woo began ranting. He asked Soo Yeon for a divorce and left the two.

Hyun Woo then talked to his friends and ask them what he should do. Yoon-ki wants him to file a divorce and Joon-young said he shouldn't because Soo Yeon does not deserve to be the only happy one. While the two argue, Hyun Woo is left with drinking. After that, he went home and posted everything that happened online. Meanwhile, someone knocked on their door and it was his mom who wanted to stay over their house for a few days.

He did agree then his mother asked where is his wife and kid and then Hyun Woo suddenly remembers his kid. He went to his school but Soo Yeon already fetched him. He then called Soo Yeon but was ignored then Soo Yeon called him but it was his mom who answered. He immediately went home and saw the three in their house.

His mom sensed the tension so she reprimanded Hyun Woo if he is having an affair and that Soo Yeon is pitiful for what he did. Hyun woo was trying to explain what really happened but his mom was ignoring him. After that, he talked to Soo Yeon in their son's room. Soo Yeon said she'll stop everything but Hyun Woo did not believe her.

Hyun Woo did try to talk so Soo Yeon but every time he asks her about the affair and Soo Yeon is not answering him directly he gets mad. Also, Hyun Woo thought that TUNAMAYO, his regular commenter, was Bo Young, a colleague of his. But he was wrong. In the end, Hyun Woo wanted to talk to Sun Woo and get answers from him after not getting much from Soo Yeon.

This episode, for me, revealed many things. First off, the way Hyun Woo handles Soo Yeon and their marriage. He is too aggressive. Second, the way Soo Yeon responds to him when he is confronting her, she is too weak or should I say, calm when approaching him. I guess her response to him was alright because she was the one in the wrong but Hyun Woo's actions can be justified too.

I, myself, am really excited for episdoe 5. We just have to watch more to know more!