A/N: This isn't directly cannon to the main story, but takes elements from it. I love Undertale and just wanted to try out my own story for it. Not the best at it but hopefully you enjoy it.
Day 1(?):
I found a spare notebook in Toriel's room while searching around, so I decided to keep a journal to keep track of what I do or where I even ended up, and maybe somebody might read this. I might even become a bestseller writer or something, like Harry Potter or Twilight! Gotta get rid of these few pages of scribbles though later. Anyways, so far since I've fallen here, the monsters seem nice and easy to get along with. Toriel found me after a particularly mean flower, name Flowey (original name, I know) almost got me killed. Lucky, Mom had found me and came to my rescue. After a while of me getting myself in bad spots, puzzles, sassy rocks, and icky vegetables, finally I'm here waiting for Mom to finish baking. Shes been so nice to me since I got here, and deserves the title Mom. I feel tired so I should probably take a nap while I wait. Hopefully I don't fall asleep too long, since I don't have an alarm on this phone...
~ i✿i ~
Definitely the best one I've had. In fact, I should sneak more later if Mom isn't looking, without getting caught maybe. So back on topic, I just woke up and writing this would pie shoved in my face, really unsanitary if anyone could see me. I realized plant in the vase was a water sausage! Wonder if they taste like vegi hot dogs? Anyways, after I finish up writing this, I should probably see how Mom is doing. I can hear her humming from the distance, so she might be in a good mood.
~ i✿i ~
Mom said when I wake up, tomorrow we could meet with the other monsters in the Ruins later after breakfast. They probably won't do much to me since Mom will be there to protect me. But honestly, the monsters didn't seem too bad, since after I talked with most of them, and a few seconds of dodging attacks, they were kind and gave me some gold coins, with a big G on them. I could probably visit the spider bake sale again later, since I didn't have enough money when I passed by it. I should go to bed now. Mom might get upset I'm still up and not resting up for tomorrow's venture. I'm so excited! Anyways, time to catch some z's. Maybe I won't have to eat vegetables again… maybe…
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. ̴̅̈́͗̏͂̎̀̂̒̆̾́͗̏̽͆̃̃̅̋̌̇̂͛́̑̾̋̕͠͝͠ ̶̛̅̈́͆̑̀̈͊̊́̇̅̓̂̎͐̐̓̇̽̐̀̑̋̂̿͘͘͠͠͝ ̴̛̓̉͑̈́̐͌̅̐́͂͒͗̈́̀̋̑̄̃̽͗͋̅̋̀̇͌̽͘͘͠ ̴̇̔͂̋̐͆͌̾́͐̾̔̇͊̓̈́͆̈́͒̓̂̾̿͊̉͂̚͝͠͝͠͠ ̶͛̃͒́̆̍̈͋͊̇͐̏̀̍̿̒̅͂̈́̂̃̇͛͆͐̓̿̉̐͘͝͝D̴̏͂̀̐̐̋̓̉̋́̈́̊̌̃͋̐̇͒̾͆̏͐̄̍̏̈́͝͝͠͝͝ẻ̸̆̅̉͋̀͛̉́̓̓́̋͗̈́̈́̔̀͛͗̓̈̽̐̀̀͂͛̽̚͠͝T̶̛̔̈́̌̏̿̅̽̃̋̋͑̌̊͐͆̅̎̈́͐̇͌̓́͑͗͘͘̕̚͝e̵̛̐͛̓͊̒̉͛̊̆͊̄̄̃̇́̐̓̒̒̋̍͛̇̕͘̚̕͝͠͠R̸̛̛̛͒̍̀́̀͂̃͂̀͆̍̇̐̾̄̀̄̅͛́͘̕͘̚̚͝͠͠m̷̒̂̊͐̈́̐̑̌̌̆̑̔̿͐̔̏́͊͆͗͆̀̃̅̐͑͘͘͘̚͝I̸̛͊͑̑̆̅͛̊̍̊̽͐̿̽͆̀͂̏̇̂͛̇̂̄͌̅̈̉̿̈͐͝n̴̛̛̍̒͐̽͐̎̒̾͆̾̀́̋̑̄̃̉̿̇̏̓̉̈́̊̉͘̚͝͠͠A̸̐͂́͒͒̊̑́̓͆͆̐̇͊͐̈̉͑̊̍̒͑̅̇̐̓͐̕̚͘͘͝t̷͒̿̊̽̽̇̌͗͗̎̀̓̓͐̊̏̓͆̎̉̏̎̽̚͘͘͝͝͝͝͝I̷̛̒͂͆̅̓̒̈́͒̓͒́̂́̿́͑͋̃̓̽́̌̅̾̊̔̈́̕͝͝͝o̶̅͊̀̃͗̏̑͌̋̉͊̾̓̈̓̓̃̉͛̌̆̈́͒́̀̒̔̊̕̚͝͠N̴̛̔̐̑̓̒͂̈̒͊͛͛̈́̇̎̔̈́̌̇͊̈́͆̏̇̍̅̌͘̕͘̚̕ ̷̂̽̾͌̄́̏̓͌͆̓͋̀́́̈́͌̊͂͛̈͌̈́̓̓̊͌̔͘͘͠͝ ̵̾̅̋͛͛͛̐̅̄̾͛͋̋̋͑̓̃̇̏̌̋̾̐̓̈́͘̕͠͝͠ ̴̛͒̓̃̈̈́̄̅͆̐̀̈́̆̒̑̂̅͋̐́̊̀̈͋̑̀̐̀͗̂̈͝ ̸̛̛͊͆̀̿͛̒͑͒̋̓̓̓̄̐̔͌́͛͂͗̑͋̇̂̚̚̕̚͝͝ ̶̉̇͊͗̏͌̄̀̓̈́͛̽́͆̂̀̾̈́̎̋͐̈́̿̽̽́͗͠͝͝͝͝.