Red is walking in the forest with Doomfanger, as Doom for short. Thinking about his life, his own brother destroyed one of his eyes and told him that they're no longer brothers. That's fair to him, anyways, he's just a lazy bone and he doesn't deserve to live with the head of the royal guard. It's been 2 months since the last time he saw Pap, he misses him... He has made friends with many monsters such as Grillby, Tori, Muffet, Mettaton, Blooky and more. But despite everything, he's alone...

He regularly check his bro's health by asking Undyne, they're pretty close now. Suddenly, Doom says: "This is a dangerous place, Red, and you know it! We must leave, the black and white kid (Core Frisk) told you the way and we should better listen to them, everyone here is crazy!" Sans signs:" And I am, too! Talking to a cat, who would even do that!"... "No, you're not! I was born the only talking cat, you're not crazy, you just don't want to leave here, don't you?"-Doom asked. Sans smiles:"Heh, you know me best..." "Fine, but don't get yourself in trouble, kay?"- Doom worries "Sure, bud, i'll keep myself completely safe"-Sans let out a fake smile as he keep walking in the forest not knowing where he'll be...

He has found lots about the other timelines but has never try to go, until he found Underfell, a place just like his timeline but not everyone is insane, and... Red sobs... his bro is still with him... He asked Doom and it nodded, they then walk into the portal leading to Underfell, where their life changes.