You and Gyomei are made for each other and, after five years of dating and eight years of knowing each other, both are ready to celebrate their wedding accompanied by their family and loved ones in a grand wedding. But a dark shadow looms over both of them on the happiest day of their lives, all hell is going to break loose...

The wedding and the reception went off without a hitch, now united in marriage they are preparing to celebrate in a large hall, the gardens were the perfect setting for photographs with the guests and alone, being an excellent sunny day. When night falls and, without knowing how, the celebration is interrupted when one of the guests falls from the balcony of the second floor of the hall and when initially thinking that he ends up hurt, it turns out that he has become an undead being that attacks the other guests without any remorse.

During the chaos, people try to flee and are bitten by the other guests who slowly become more monsters hungry for human flesh. You and Gyomei end up separated and taken to different places thanks to the chaos, and he barricaded in the kitchen with Sanemi, who had finished him off there. Now the problem is, where did Gyomei's soulmate end up?