Cover by: @_Malio_ Identical twin sisters Ayano and Anaya didn't believe that an innocent walk up Mt. Ebott would take a turn for the worst. After falling down in the Underground with her twin, the younger of the pair, Ayano wakes up to find that her sister is missing. Traveling through the Underground, Ayano makes new friends, and struggles to find her sister before she heads home. Trying to find her sister in the midst of the chaos in the Underground, fills her with DETERMINATION! Ayano is meant to be you, the reader, but she is named, and has a set backstory and such. Also some Reader x Sans will be present, as well as Alphys x Undyne.