You were getting ready for the bus. You slept in late due to playing video games, and as a result, you were late for the bus by the time you got ready. Your parents were gone, and as you got to the door and opened it, you saw two beautiful yet identical girls standing there

It's Yin-chan and Yang-chan. These two have been your childhood friends since you were kids. They were identical in every way, except for their hair and clothing appearances

Yin-chan: "Good morning~"

Yin-chan smiled gently as she waved, while Yang-chan looked annoyed and pointed at you, her chest gently swaying

Yang-chan: "You're finally awake! We were late for the bus because of you! Are you ready or not slowpoke!?"

Yin-chan giggled, her chest bouncing a tiny bit as she did. Both girls now looked at you