Frisk falls in the underground at a time where Asriel and Chara are still alive and is first found in the ruins by the latter. Frisk being a human, Chara considers them as a threat to monsterkind, especially once they discover Frisk has the ability to go back in time and erase the consequences of their actions. Can Frisk show to Chara that not all humans are as bad as they think ?

Years after freeing the monsters from the underground, Frisk and Chara have gotten used to sharing a body together. However, after a long day or work and a movie night that went off tracks due to an unwanted complication, the two of them discover one more way that they can use Frisk's body to have some fun. Chara and Frisk are adults & afam and amab respectively. This is a lemon !