　（･･･ごめん）髪をゆらゆらと揺らしながら、綾が泣きそうな顔をしている。
　（ううん。いいの）千早が応える。目の前の少女は、自分の空気すべてを与えてくれているのだから。
　それでも、早く他の脱出口を探さなければ、二人ともこのまま溺れてしまう。

"I'm sorry, Chihaya."
Letting flocks of her hair drift in the water, Aya seemed as if she was about to cry. "I - I didn't mean to-"
Chihaya moved her lips in response. "We'll be fine."
Aya had surrendered all her precious air, and that was way more than anyone could ask for. But in the meantime they had to find another way out - or stay here and drown.

英文あらすじ（Synopsis）：

Chihaya and Aya swims back to the door that leads to the deck through the mess hall. It is of course locked tight - and Aya had lost its only key in the gushing torrents. They have to find another way to save themselves from imminent drowning, only minutes away...