Haseul : i want to kiss you on lips

Vivi : if we dating

When they dating

Haseul always kiss vivi

Haseul : i want to doing it.. 

Vivi : if we married 

After married 

They doing it 

Haseul : i want a baby.. 

Vivi : if i don't use  

They don't use  

After haseul pregnant 

Haseul : *having mood swings* *cravings at random time* 

Vivi : *stressed* it's okay, just do what she want..  *still love haseul with all her heart* 

And that how heejin and yeojin born