Two strange men just barges in through the doors one day. They say that they are 'Choco', Jungwoo's childhood pet dog and 'Milk', his childhood cat. Can Jungwoo trust these weird and handsome men?

Jungwoo is going crazy because of Milk and Choco which follows him everywhere. Finally, Choco and Milk followed Jungwoo to his workplace and suddenly he started wondering why Milk and Coco came back as human beings.

As Jungwoo gets used to his new life with the return of Choco and Milk, the memories that he wanted to forget are coming back. At the same time his uncle is happy about the cafe and the new and bright appearance of Jungwoo. However, Choco and Milk seem to be hiding something.

Choco and Milk are worried because Jungwoo is sick. They decided to help him doing part-time job and cleaning the house. Choco prepared meals for Jungwoo and Milk started to work with Jungwoo’s uncle at the cafe. Will they make it until the end of the day?

After a long time Jungwoo is going out, he is going on a blind-date and Choco wants to follow him. How long did they talk? In the end something surprising happens to Jungwoo, who was heading home because he was worried about Choco and Milk.

For some reason, Milk stares at Choco all day and Choco has eyes only for Jungwoo. And there is Jungwoo who ignores Choco. Sensing a strange atmosphere, Jungwoo´s uncle tries to fix the atmosphere by using the cafe inventory survey as an excuse.

Choco, who was sitting alone on a swing waiting for Jungwoo, finally heads home with Jungwoo, who has returned before long. Leaving Choco behind, Milk went to Jungwoo’s uncle's restaurant and asks him to buy him a drink after work. How were their nights?

Milk is worried that the night before, while he was drunk, he could have made a mistake with his boss and Choco is worried about leaving Jungwoo. Meanwhile, Jungwoo and his ex-boyfriend met after a long time. They went on a date at the Han River reminiscing about the past.

An unknown feeling grows in Milk when he thinks about the boss and another person being together. That's why The boss pay much attention to milk. Jungwoo, Choco and Milk, who are sitting together after a disturbance, talk about the secret that they have hidden, and the new breakup after their return.

The day of parting has finally come. Milk will leave and Choco finally decided to stay. Jungwoo and Choco have a conversation that may be the last.

Time passes by and Jungwoo returned to his daily routine. He is trying to live well by himself without Choco and Milk.