undertale · sans · pacifist route · polyamory · beach setting · adult au · romance · puns · fluff · monster
The mid-summer sun beats down on the golden sands, marking eight years since peace returned to the world. Humans and monsters coexist in harmony; Papyrus and Sans reside in a cliffside home above the city, while Toriel and Asgore dwell nearby in the forest. Frisk, Chara, and Gaster share Sans’ roof. Today, the entire cast has gathered for a beach day organized by Frisk. Toriel and Asgore hold hands on lounge chairs, Asgore beaming. Asriel builds a sandcastle with Frisk and Chara. Muffet circulates with cold drinks. Gaster stares silently at the horizon. Undyne teaches Alphys to swim. Mettaton entertains a swooning crowd. Sans lies on his towel, while Papyrus sits upright, observing the scene. Suddenly, a group of girls approaches Sans.