[ After school ]

Sana saw Tzuyun car in front of her and Tzuyun got out of the car 

"Oppa why are u here?" Sana asked 

"I'm here to take Mina home" Tzuyun smiled 

"W-wae?" 

"Ah...well Chaemin suddenly burst out just now and he was supposed to drive Mina home so I will drive Mina home instead of him than" 

"Ah..." Sana went to silence 

"Why are u so silence today? Where did the 4D squirrel went?" Tzuyun joked 

"She's not in the mood to come out" Sana pouted 

"Wae?" Tzuyun smiled 

"4D squirrel is confuse right now" Sana pouted even more and Tzuyun moved to Sana's ears

"Don't pout, it would make me want to kiss u" Tzuyun whispered 

"P-prevent" Sana pushed Tzuyun a bit further from her "don't joke around, I'm not on the mood" Sana blushed 

"Oh! Tzuyun!" Mina smile widely as soon as she saw Tzuyun 

"Noona!" Tzuyun hugged Mina and Mina gave him a playing glare 

"Why are u here? Where's Chaemin?" Mina asked when she pulls away 

"He got moody just now so I came for u instead of him" 

"Oh" Mina replied "but why moody?" 

"I don't really know why to tell the truth" Tzuyun said innocently 

"So you're here to take me home right?"

"Yep" 

"..." Sana was in silence for the whole conversation 

"Why are u so silence Sana?" Mina asked looking at the quite Sana

"I-it's nothing" Sana shook her head "I-I will be going first" she bowed a little before walking away 

"Be careful on your way home sana!" Tzuyun shouted but Sana just keep on walking and didn't look back "Should we go too?" Tzuyun asked 

"Sure, let's go" Mina replied and linked her arms with Tzuyun and they both went to Tzuyun's car

___________________________________________________________________________________________

[ Tzuyun's Car ]

Tzuyun is driving Mina home right now but he can't get his mind off on why Sana is moody and a bit sad but why was she sad?

"Mina noona" Tzuyun called

"Hmm?" Mina who was looking outside is now looking at Tzuyun 

"Do u know why was Sana sad?" 

"S-Sana?" 

"Yea"

"I don't really know tho" 

"Ah..."

"Wae? Why would u ask that?"

"Well she's not the 4D Squirrel just now" 

"What do u mean 4D squirrel?" Mina asked 

"I always call Sana 4D squirrel since she has a face that resemble a squirrel while 4D is because...u know right?" Tzuyun smiled when he mentioned Sana 

"Yea I know what kind of 4D" Mina giggled

"Noona...do u like Chaemin hyung?" 

"C-Chaemin?" 

"Hmm" Tzuyun nodded

"Of course I do" Mina confidently said 

"In a romantic way?" 

"R-romantic?"

"Yes or no?" Tzuyun asked seriously 

"I-I" Mina looked down on her hands "I don't know" Mina said af