Early morning, You just woke up after some dream about your first love when you was a little kid. Your eyes are still half-open, half-empty, you sit up on bed and think by yourself about nostalgia dream and then you look at the window

When you still busy think about your life when you was a kid, your parents divorced so you was sent to your grandpa's house, the park where you and your first love met and full of happy memories even though you can't remember who she is again, that was your first love memories... and suddenly someone kick your door.

"BAAAM! That's enough of being serious, my damn sleepyhead elder brother!"

You was about to tell her to stop kicking your bedroom's door but she dhoes not give you time to answer back, she suddenly jumped into your lap

"BAAAM!"

After recive a weight on your laps, you look down at her and she is grining playfully and cutely

"Bonjour~, mon frère"

That's right, she is your blood little sister Yuki Suou, the successor to the dustinguished Suou family, whose custody went to your mother after your parents' divorce and you went to your father...You told her to get off your body since she is too annying