愛香と愛花は双子の姉妹。

二人は何処へ行くもの、何をするもの一緒だった。

二人で一つの関係。

それはずっと変わらない・・・

二人はそう信じていた。

そんなある日、二人の間に生じた“違い”。

それはいつからだったのだろう。

その“違い”をきっかけに物語りは歪み始める・・

Aika and Mana are twin sisters.

They went everywhere and did everything together.

They were one.

They believed it would never change…

They were certain of it.

Then one day, a “difference” arose between them.

When did that truly begin?

With that “difference” as a catalyst, the story begins to warp…