The story about some kid who name sans are playing around until he hear something the side of his house he go look for it till he saw what he could'nt beliver what he saw a 12 merman kid he was really happy cause his mom always told him story about rhymt but all of rhymt he like the most is about merman/mermaid and the merman kid was him and tired run but classic stop them and told them that hes good and they became friend and sans always visit them and told them what in the surface but then one day sans have to move out cause his father job and he didn't have time to say goodbye for last time he felt so bad for them and the merman kid always waiting for him but he never come and the six merman are had enough for waiting him and after a year pass there two sekeleton move in the house but sadly he really can't remeber anything in the past Oh yeah one more thing i have make first book and i have looking someone to join the book you can look what you want to roleplay as and the book about undertale and demon slayer crossover and there i make sans au x classic sans and giyuutan so yeah hope you guys look the first book

(The reader will be Nezuko in this book. I am bad at making stories so please be patient with me.) (Y/N) Kamado, the sister of Tanjiro Kamado. (Y/N) was in her box on Tanjiro's while Tanjiro is going on a mission, but a portal opened and they fell in. When Tanjiro and (Y/N) meets the Sanses, the Sanses started falling in love with (Y/n) and became yanderes. Check out my profile to read my other stories: Yandere Kny x Lady reader Soulmate-Sans Au x Kamado reader x (3 only) Papyrus Au