December 18, 2017, 11:00 am. 

Chungha was at her house resting after her jogging this morning.

Knowing today is Nayoung's birthday, she decided to call her former I.O.I Dongsaeng,Mina, to request her a favour. She picked up her phone and start calling her. 

"Hi Minakuun, it's your former Chungha. Can you do me a favour?"

​​​​​"Of course, what is it?" 

​​​​​"Today is Nayoung's birthday and I need you to bake a cake for her, you can make any design as long as it's fresh." 

​​​​"Oh my, that's a request for me?"

​​​​"Yes, my dear."

​​​​​"OK Unnie, I'll be making this wonderful cake from our stone leader. I'll update you once it finish."

Mina hung up and Chungha decided to do her daily routines while waiting for Mina to finish baking her cake.

Few hours later, she received a text from Mina informing her that she had finished baking the cake and needs to come to her house to pick it up together.

Chungha changed to her winter outfit and proceed to Gugudan dorm.

It took her 2 hours to reach to her dorm."Hey, what are you waiting for? Come in, I'll show you the cake that I baked." Mina opened her dorm and let her in. 

​​​​Mina And Chungha went to the dinning room to look at the well-baked cake Mina baked recently. The design of the cake was a stone with Rainbow frosting inside.

"Oh my Mina, Nayoung will definitely like it."Chungha complimented. 

"Hehe, this cake represents her so she will like what I baked for her."

​​​​​"We should head to Pristin's dorm and surprise her."

"OK Chungha Unnie."

December 18,2017.5:30pm

"Ok girls, Nayoung Unnie is arriving home soon, we will need to