Episode 4 of XO, Kitty begins with Kitty’s reassignment to a room in the girl's dorm. She discovers that her new roommate is a messy player who has left the room in a state. Kitty spends the next few days doing her best to live with the messy girl. Kitty talks to Professor Lee about it. But, he tells Kitty that there are no other empty rooms in the dorms. She'll just have to try to make it work.

See Also: XO, Kitty — Episode 3 Recap

That night, Kitty has a talk and tells him how much she missed talking to Dae, her best friend. Q tells Kitty that Yuri is not an outdoors person. She asks her to join the nature club on a hike the next morning.

The next morning, Dae and Q go on the hike, but Minho convinces Kitty's information by joining them Q. Q immediately calls Yuri and tells her that Kitty and Dae will spend more time together. Yuri shows up at the hike and stops Dae from talking to Kitty. Minho also shows up and meets Maddison. Yuri gets anxious when a bug lands on her and Kitty uses this as an opportunity to talk to Dae.

They share a moment where Dae helps Kitty not to fall, but Yuri interrupts them, teasing Kitty. The two girls end up in an argument that leads them to race to the top of the hike. Kitty reaches the highest point first and shares her experience about her mother with Yuri, who follows her. Yuri also shares how she was neglected by her mother as a child.

The two girls start to bond, but Yuri acts possessive when Dae joins them. She asks Kitty to take a picture of the couple. Kitty notices the hospital because of her mother's label in the background of the photo and decides to run to the hospital.

Kitty uses her matchmaking skills when she makes the nurses fall in love with each other before sneaking into the records room. Somehow she manages to find details about her mother's birth and learns that her half-brother was adopted in Australia. The hospital staff catches her but she asks to call Professor Alex who comes just in time to save her.

Meanwhile, Dae apologizes to Minho for telling his secret to Kitty. Minho is sure that Dae still has feelings for Kitty. But Minho tells Dae that he found a dream stream of Kitty on the Internet. Inside Q's room, Q finds it hard to believe that Alex is Kitty's half-brother, but she claims that he is probably at K.I.S.S to learn more about Eve Song as well.

Q asks Kitty to calm down, but Dae and Minho tell Kitty that she is being filmed in her sleep. The four decide to let Kitty sleep in the boys' dorm, and she agrees to sleep with Q while Minho and share the same room.

This series is practically ideal for any K-pop fan, the amount of songs it has during episode 4 is quite a lot. On top of that, Kitty was able to sneak into a hospital so easily, and achieve what she really wanted (the information from her mother's side), but that's what imagination is all about, and this causes an unimaginable level of excitement.

Episode 4 manages to form a more compact story full of secrets and revelations, and a lot of suspense in the main plot.

XO, Kitty is now streaming on Netflix.