"Party x Party" tells the story of a girl who does not wish to be alone one night and decides to go on a quest to "have the party of her dreams". On her path she encounters a bard (Rin) and a gunner (Len). They then head together to the NicoNico Pub, where they meet the merchant (KAITO), the dancer (Luka), and the bartender (MEIKO). The six of them then decide to head out in the morning after a chaotic night to embark on their own quests. They hit numerous bumps in the road, but the group travels on, determined to finish their quest. The party happens upon the final boss' chamber, just to find out that the rookie (Miku) was the villain all along. However, the six of them put aside alignment differences to throw the ultimate party.