Kids always know exactly what to say or... what not to say.
Live happy together!!H-Hey, you stop that!
We're leaving!They're a couple, couple!He's blushing!Wrong...!
What are you saying!And nee-chan is the girlfriend, right?Boy...!?Because, you nii-chan, you're the boyfriendHa!?Have you already kissed?Yes!We're going!Any last thing you want to ask!?Now it's fine!Okay!