When his father dies, Shuji Machiya goes to the house his father was renting to collect his possessions. There, he meets his father's mistress, Sakie, who's been waiting this whole time for his father to come...

When a zombie apocalypse suddenly breaks out during the school festival, shogi player Koutarou manages to save the beautiful and buxom Kana just before she’s taken by a swarm. But when they reach Kosaka Kotaro...

Kagidou-san became his personal love-slave, but how did this happen and more importantly, what will happen to her in the future?