This isn't the first chapter, I just wanted to explain some of the lore and things about my OC before you read. So, his name is Icarus, Icarus River Seraphin. His birthday is October 19th, 2000, and he has a Bravery Soul. Which, is interesting since he's a Libra, a Justice seeming sign. He's the sixth to fall, after Integrity (going off that UT Yellow is cannon in this universe). Icarus' older brother is Clover (Justice Soul, from UT Yellow), which plays a large part in this story.
Icarus has black hair, medium length, and he's lithe (thin and small, but not weak). He's probably... 5'6? Maybe that's a good height; you picture his height as you want (I'm 5'1). He also has heterochromia, which is when someone has two different eye colors. His are green and brown. He might have vitiligo (patches of two skin colors) but I'm not sure if that's too much, especially with the heterochromia. If he does have vitiligo, he'd have olive tan and pale patches, though just olive if not.
[I'm discribing this now so you don't get halfway through the book, imagining him with blue eyes, then come to find out they're brown and green, or something. I know it's annoying when books do that. Like, 'since when was this character blonde?']
I'm still in high school, so updates will be infrequent. Also, even though I know the characters and such in Undertale Yellow, I've never played it (I've only played Undertale and Deltarune). And I know some chapters are short; I'm not the best a pacing, or world building. I'm best at making characters. And I also make a diary page, then a chapter, then a diary page, etc., in this story, unlike how some stories are.
This story is completely my idea, not based on any actual Undertale Orange fan games that may exist (although I don't think any do).
I hope you enjoy, and I apologize for the long intro. If you have any recommendations or questions, comment and I'll try to answer (although I just got this app so I'll figure out how to soon).