When the doomsday comes, there is someone who will never leave you and protect you. This is his belief in survival. In this world where zombies are rampant, the two of them are not afraid of facing the waves of zombies. What they are afraid of is that they will not be able to accompany each other until they die.
Tsundere gets bitten and forced to attack
Seeing as they met and fell in love, they did not kill each other.
It's cruel, but still much sweeter.