It was seven weeks after True Pacifist. Monster-kind and Human-kind are now in peace. Monster-kind was freed.
You got adopted by Toriel and Asgore and... Sans. So you basically have one step-mother and two step-dads. Although You got used to Toriel and Asgore.
But due to every Monster looking very realistic. Welp. Every time Sans teleports right where you were, it was jumpscare for you.
One day. Toriel and Asgore gone to vacation. And now the only one in house was you and Sans... You didn't know that Sans was in your house. You were laying on bed watching Tiktok on your phone. Obviously you done all homework and it is Winter vacation.
Sans teleports right infront of you. Making you drop phone on your face from jumpscare. As you immediately sit up as Sans looks at you with his left eye that flashes blue while his right pupil gone.
He then speaks to you in serious and angry tone while looking like he will kill you right where you belong although he doesn't actually do this to you nor he even angry at you...
Sans: y'know, my bro is gonna come in. also, give your old skeleton a hug