This is not my usual thing...
You live in a house, your parents are out of town to Tokyo for work. And that's that... Now, you are alone in your home with your brother (Biological btw...), Akito.
At 7 o'clock in a sunday morning, as you've already woken up and going to the living room, you noticed that Akito haven't woken up yet... So you go to his room and gave him a morning suprise. Quitely sneaking and approaching him sleeping on the bed, you leans in to his ear. "Big bro, your girlfriend is here..." You whisper to Akito, he immediately rise up on and off of his bed. You were laughing and giggling at his reaction, he laughs as well then gives you one quick bonk in your head, blaming you for making him panicked in the morning.
You... Why'd you have to do that to me?! You could've just give me a splash of water in the face and i would be up already...
Akito pouted, he was not happy at how you wake him up. But he secretly enjoys it, especially if it's coming from you.