(m / n) (L / n) is a 20 year old boy and he is the brother of frisk and the soulmate of the skeleton monster named sans. a few months ago the two of them had fallen underground and managed to free the monsters from the underground. A few days later the monsters had resided on the surface, there were some humans who had accepted them and there were still some who hadn't. but frisk and (m / n) have overcome this so from now on there are many humans who are willing to accept monsters with open arms. but one day right on frisk's birthday, their brother (m / n) has died because he saved frisk from a mysterious attack using a gun. since death (m / n) frisk and sans experienced a little depression, since then frisk became trauma and experienced nightmares about (m / n) but sans was always there for frisk to calm them down. months have passed Frisk has gotten a little better about their nightmare and accepts the death of their brother. while sans is still hurt because of death (m / n) but never shows the feeling of pain in front of everyone except frisk. but sans is still going strong because of the request and promises of (m / n) before he died. "sa-sans ... I-have a wish and a promise before I die." "Please don't say anything and you won't die !! Please hang on in a little while the ambulance will come !!" "My request is to-please keep the fr-frisk for me as long as I'm ... gone and promise ... promise me ... if you won't hurt yourself ... and ... please stay strong ... for me..." sans still remembers the requests and promises made by (m / n) at the time of his dying. he will keep his word (m / n) but without sans does not know if one day they meet again and (m / n) is not what it used to be. curious about the next story? read this book and see what happens to sans and male! reader. UNDERTALE || TOBY FOX || MALE! READER || READER THEMSELF || 'hello everyone!! Wellcome to my 2 book and i hope you guys enjoy and like my 2 book this!!' - keyrakhansa97