illust/14606811 と illust/14725352 の更にIF。
最初の襲撃から辛くも逃れた姉妹。
しかし逃げ惑ううちに追い詰められ、否応無しに姉妹は”敵”と対峙しなければならなくなった。
その意味不明な敵を前に妹が混乱する中、姉は咄嗟に死体が握っていた銃に手を伸ばすが・・・
妹「ちょっと使えるの！？」
姉「ゲ、ゲームで使った事あるから！！」
やっぱり今回もやられそうです

The sisters managed to survive the first attack.
But after the sisters ran about this way and that, they found themselves cornered and forced to confront 'the enemy.'
While the younger sister was panicked by the inscrutable enemy facing her, the older sister reached out for a nearby corpse's gun...
The younger sister: "Hey, can you use it?"
The older sister: "I-i've before used this in a game!!"
...They seem to face disaster again....