You got adopted by Toriel since you were orphan, now you live with Frisk, Asriel and Toriel. Although due to your age you're big step-sibling. Anyway, you also now have Uncle Sans which for some reason using your curiosity, you stole bad memory and used it, making you remember all his bad memory and yours too to the point where you know about him more then your biological parents.

Anyway after a month, you were in your room, as you done all your homework. Then you decide to listen to Asriel's door and about 5 minutes you hear Sans and Asriel chat. About how Sans tells Asriel that everyone cares about him/Asriel about how Sans was technically parent to Papyrus since even childhood. And now Sans start to tell pun with Asriel Blah blah.

You stopped listening as you hear that they're about to leave the room for tea drinking as you bolted into your room and closed your door. As they leave, you go back to your bed and start to watch tiktok