Looking Back

After being freed from the underground by frisk the monsters have been living very good. Toriel, Asriel , Asgore and frisk had gone out of town to move to the city for frisk's new job so everyone hasn't seen them in a while, but when they come back to town when frisk is all grown up, what will happen when the punny skeleton has to see her more when he has feelings for her? And what about frisk? Find out in underlove sans x frisk