Mao-chan, the little stepsister I got when I was in 3rd grade.

Onii-chan, let's go to school!

There, there.

Waaaah!

It huuuurts!

Mao-chan was a crybaby so I couldn't leave her alone,

I was happy to be a "big brother". So I had to take care of her.

We weren't related by blood but, before I knew it, she became my precious, true "little sister" in my heart.

...but...