Gaster takes a deap breath as he poors the test tubes liquids into the other. He has been working for hours. He exhales. He usualy dosent work for this long but he missed yesterday and had to do SOMETHING. Gaster sighs and gets up. Takes off his black coat and sets it on a hanger. It was a long day at work and the kids need to be put to bed. As he sloely opens the door to sans's room he noticed he was alredy asleep. "d-dad…?" sans slowly opens his eyes. "shhh. Go back to sleep." He closes the door and gos to cheak on papyrus. Sans grabs him by the shirt and pulls on it. Gaster turns and looks. "sans its very late you should get to bed." "i refuse! Im not a kid anymore dad! Im 15! So stop treating me like im 5!" sans replys with an angry look. "sans plz its been a long day for me and i need to rest" "you promised…" sans wispers to himself looking down. Gaster sighs and gets down on one knee. Sans puts his head up to look at him. "alright. Ill teach you. Lets go." sans eyes widen with exitememt as gasters eyes droop. Gaster yawns and grabs sans hand. After a long night of training sans gos to bed and gaster sits on his bed. He sighs and lays back. "i need to finish it…" hs vition get blurry from being tired. "i need…to…" He says as he closes hs eyes and falls asleep.
Gaster gets woken up by a loud bang comeing from his lab. He gets up quickly and dashes to his lab. His eyes wide open...Its emty. Nothing seams to be broken…so he sits on his chair and cheaks his watch. "its 6…time to work" He starts working as sans slams his door open. "IM SICK OF THIS" "sans plz...Let me work for ONCE." sans grabs the back of gasters chair and turns him aroud. Gaster sits there with a tired lok on his face. "NO! POOR PAPYRUS BARELY KNOWS HIS OWN FATHER CUZ UR ALWAYS SO BISSY. HES A KID HE NEEDS HIS DAD!" "Sans would keep it down!!!! We dont want paps woken up!!!" sans grips his hoodie and stares at his eyes starts to glow. " plz just STOP!! We want to spend time with our father!! Now stop makeing things that could hurt someone if there used rong and come!!!" gaster shugs "how spasific." sans raises his arm as he tears up. "time to test if it works.." gaster grabs a test tube and drinks whats inside. Sans puts his arms down and stares. G holds his head and screams. He looks at the test tue in his hands and widen his eyes. "goodbye father" gaster looks beside him and sees papyrus smirkin at him with the other test tube. "PAPYRUS!?!" sans said. "WHAT DID YOU DO?!" before pap could speek his sould turns blue and he gos flying and hits the wall. Sans is paralized in fear. Gaster slowly walks to papyrus his face and feet slowly melting. As his face melts a third eye apears under his left eye. Sans finaly snaps out of it and runs. And runs. And...Runs....Till he finds a closet to hide in. Not to much protection but it will do for now. His breath slowly rises. He can feel his blood rushing thrue hid body. His breaths now heavy and fast. He cant take it. He holds his head and crys trying not to make any sounds. His eyes widen when he sees pap get flung across the room. Hes safe in hear. Gaster walks by slowly half melted and four arms. Papyrus was so sweet...Just a kid..What happend. "the desise tok you over...I knew it would happen." gaster says as he puts a bone through paps ribcage and walks to the closet. "sannnsssss~" he says grabing onto the door. Sans curls up into a ball tears RUSHING down is face. just gotta do what he taught u. A shadow of a small animal jumps on gasters back. cute but deadly. It gos into gaster as he disapears into thin air the shadow animal pokes he door with his nose. Sans opens it and stares at it as he sees dust on the floor. "i knew you would come i handy one day. Sans wipes his tears and hugs it. Papyus rips the bone out of his cheast and drops it. He stares at sans. "brother-" he says walking over to sans. Sans falls back and scoots backwords. Pap gets down puts out his hand and smiles. Sans quickly hugs him NO hesatation. It was a mistake. An arrow gets shot into the back of his skull and passes out. Undyne stands there with a bow smirking. Papyrus smirks aswell eraseing his memory =)
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Undershadow- The Breakdown
FanfictionMy au undershadows backstory...Idk what else to say cuz thats all it is