This happens after Sana made Tzuyu search all the abandoned buildings in Seoul (chapter 20)

Tzuyu's phone had been beeping and ringing and beeping,  new messages pop up after the other and those texts all came from a single clumsy snake that has a face of a squirrel slash Shiba inu- at least that's what Tzuyu thought of her. 

Getting annoyed by texts turn into calls by now, our hero then turn her phone off before throwing it on the couch as she slumps on it and watch on her 62 inches concave plasma TV, her suppose to binge watch the series of adventure time was interrupted by a continuous knock , door belling on her door and a call of her name.

Tzuyu opens the door,  just to slam it shut again after seeing Sana but what confused her was that the door wasn't shut and there's a hissing on the other side of the door, looking down Tzuyu found the reason to why the door wasn't shut and and the cause of Sana's hissing. 

Sana uses her foot to refrain the door from shutting and God knows how much it hurts, Tzuyu opens the door that causes Sana to smile but was soon gone when the younger girl steps on her other foot and shutting the door again while Sana jumps up and down while alternately holding her both injured foot. 

"Hmmp!" Tzuyu voice out after closing the door not minding the sound of pain on the other side of her door. 

"I'm not leaving until you talk to me Tzuyu!"

"Then rot in there,  I don't care...  Tch!" She said to herself as she walks to her kitchen to grab something she can eat. 

As she takes a bite-

"How could you eat peacefully when someone is out there"

"..*munch*..*munch*.."

"How mean can you be??  Now wonder Mo-"

"Ugh!!!  Shut up!" Tzuyu slams the food down getting frustrated with her conscience. 

"Hope you yap like this when I'm taking my exams you stupid conscience" Standing up,  she walks towards the door and open it,  unfortunately Sana was leaning on the door causing her to lay flat on Tzuyu's feet. 

Sana blinks a few times before cracking her infamous smile. 

"Ohayo!" Sana greeted while waving her hands still lying on the floor. 

Tzuyu gave her a hand and Sana isn't Sana if she didn't trip,  slip or fall over nothing but I guarantee you folks that this Sana here is a 100% authentic. 

Not wanting to kiss the floor Sana holds on to Tzuyu's neck making her partially hugging the younger girl.

"Uhhh~ hi" Sana said with an awkward smile as she stare right through Tzuyu's eyes

"Are you planning to say hi to me in all the languages you know?" Even though Tzuyu didn't faze her heart skips a beat on how close Sana is to her and how the latter stares at her right now as she takes Sana arms off her neck. 

"Sorry about that I was a tiny bit clumsy hehe" Sana said as she scratch her not so itchy cheek. 

"Tiny bit huh?" Tzuyu mocks as Sana pouts on what she just heard. 

"Yah-"

"You have one minute to apologize before I kick you out 60...59...58" Sana wasn't able to complain when Tzuyu started to count,  her eyes widen as panic started to envelope her. 

"W-wait Yah!!"

"57..56..55"

"I don't know how nor where to start but I'm sorry for dragging you to all of those buildings,  I'm sorry for being stupid and I'm sorry that I let all the k-dramas that Nayeon made me watch get into me" Sana sincerely apologize. 

"Is that all? If yes you can now go cause I have things to do" Tzuyu said as she pushed the latter out. 

"Nooooo!!! I bought two tickets to an amusement park.  You just came here and I know you haven't gone out much so we'll go out... As a part of my apology of course and don't worry it's my treat."Sana explain showing the two tickets and waving them in front of Tzuyu. 

Tzuyu thought for a minute if she'd trust this clumsy being to take her out.

"Okay" Tzuyu flatly said after contemplating, if ever something happens, she'll just hunt Sana later. 

"Really? Yehey! " Sana said as she was about to hug Tzuyu but the latter swats her hands away. 

"Hand