Ms.Ko KTV

In addition to the letter, Bong-hee prepares tea and vegetables that good for insomnia for Ji-wook. Ji-wook seems to be ready for a meal for two people even after her leave, and he feels the absence of Bong-hee.

The next day, Ji-wook submits his official resignation. He then scouts the section chief Bang as a clerk and converts the house into an office.

Bong-hee works as a teacher in the Taekwondo studio, but she can not stop thinking of Ji-wook. 

At that time, Ji-wook comes to the studio and asks Bong-hee to work together in his office. Bong-hee first refuses, saying that she doesn't want to be a burden to him anymore, but soon she follows him. 

Bong-hee and Ji-wook come back to the office where CEO Byun, Eun-hyuk, and Section Chief Bang are already there. 

Eun-hyuk wants to converse with Ji-wook to restore their friendship. They sit on the bench in the park, but they get into a fight with the students who are passing by.

In fact, Eun-hyuk loved Yoo-jung. Eun-hyuk saw Yoo-jung asking Ji-wook to begin their relationship as lovers on the way he actually was going to confess his love to her. After seeing that, Eun-hyun tries to give up on her but failed. It ended up having a night with her. Eun-hyun, however, cannot tell his story to Ji-wook. 

Nevertheless, Ji-wook cannot hate Eun-hyuk and Yoo-jung. They were the only friends Ji-wook had for a lifetime.

Ji-wook came back home is treated by Bong-hee. He then falls asleep next to Bong-hee. Looking at him sleeping, Bong-hee is curious if his insomnia is for real. 

On the next day, CEO Byun whines to recruit Eun-hyuk. Ji-wook accepts that. Ji-wook, Eun-hyun and Bong-hee in the office together talk about another murder case of famous chef Yang on TV. 

Ji-wook sees Yoo-jung waiting outside of his place. Bong-hee feels the woman standing there is Ji-wook's ex-girlfriend just by looking at them. 

Yoo-jung tries to talk to Ji-wook, but he doesn't want to talk. Bong-hee suddenly appears claiming herself as Ji-wook's current girlfriend. It is not only Yoo-jung that cannot believe the situation. Yoo-jung with doubt asks Ji-wook that if that is true. Bong-hee shows off their relationship by putting her arms around him. 

Turning the corner, Ji-wook blames Bong-hee doing such thing, but she says that was to repay his previous grace. Ji-wook recalls what he did to Bong-hee in front of her ex but tells her to not repay for that again. 

Meanwhile, the killer commits another crime. There is a person sees him leaving the crime scene through a window. 

Ji-wook is not free from happy memory with Yoo-jung while they were in a relationship. Bong-hee sitting next to Ji-wook says to get off, but Ji-wook can't hear anything for losing his mind after meeting with Yoo-jung. 

At lawyer Byun's birthday gathering, Ji-wook gives his resignation letter to him. Ji-wook response coldly to Eun-hyuk asking why he is resigning. Eun-hyuk also learns Yoo-jung's return by getting her phone call. 

Yoo-jung is curious about Bong-hee and finds out she was a prime suspect in a murder case. 

Ji-wook at home is listening to music alone. Bong-hee feels sad looking at him secretly. Ji-wook soon discovers Bong-hee staring at him and prepare a night snack for her. 

At the dining table, Ji-wook tells her how he broke up with Yoo-jung. Bong-hee reacts as if that was her story, and that makes Ji-wook laugh. 

Next day, Bong-hee and the killer watches the news having a meal together that another murder occurred. Bong-hee talks to the kills without knowing his identity that she is determined to catch the criminal.