(Frisk's P.O.V.)

I go up the stairs, confused. There was no ketchup, Sans had either lied or hadn't known. I open to his room to tell him but, when I open the door, I find his room empty. He isn't there.

'Sans?' I call out. 'Sans?! Where are you?'

No response.

I go all around the house, continuing to call out his name. Nothing.

'HUMAN!' Papyrus says from the sofa, where he was watching Mettaton. 'WHAT'S GOING ON?'

'It's Sans,' I say. 'He's gone.'

The sound of a piano playing in the next room stops and Undyne and Alphys run into the room. 'What did you just say?!' Undyne asks.

'Sans is missing.'

'B-but, how? Surely, he w-was too weak to m-m-move,' Alphys says.

'Well, he's definitely not in the house. I've searched everywhere,' I tell them.

'WE SHOULD LOOK AGAIN, JUST TO BE SURE!' Papyrus says. I can see that he's shaken at the news of his brother's disappearance.

'I-I'll get Asgore and Toriel t-to help,' Alphys says, going into the garden. The other three of us begin searching again.

Nothing. Sans is nowhere.

Papyrus, Undyne, Alphys, Mum and Asgore and I all meet up back in Sans's room.

'SANS...WHERE IS HE...I...I...' Papyrus is visibly distressed.

'Papyrus, I'm sure he's fine,' Mum comforts him. 'He probably just went to Grillby's.'

'NO,' Papyrus says. 'HE'S NOT THERE. I CHECKED.'

'When did you check? We were searching the house the whole time,' Undyne says. 'None of us left.'

Papyrus is about to say something when Asgore speaks up.

'There's a note here on Sans's mattress,' he says. 'It's for you, Frisk.'

I go up to him and take the note.

'I'm gonna open this in my room,' I say. 'I want a bit of privacy.'

I leave the room and go into my own, closing the door behind me.

I unfold the letter.

frisk,

i'm sorry. i had to do this. i had to leave. i'm dangerous. if you can find out my secret, others will be able to. this just raises the risk of me hurting someone. i don't want that. it's one of my worst fears.

don't try to look for me. it's best for everyone if you leave me be. that way, no one will get hurt, emotionally and physically.

take care of papyrus for me, kid. now he doesn't have a big brother, you'll have to be his sister. make sure to keep plaguing his life with puns and incidental music, okay.

finally, i think it's best you tell the others i'm dead. tell them i committed suicide. it's just to save them finding out most of what they thought they knew about me was a lie. especially paps.

goodbye, kiddo.

-sans.

A big, fat tear falls onto the paper. I stumble to my door and open it. Everyone's waiting outside. When they see my face, their faces fall.

'H-HUMAN? FRISK?' Papyrus asks, voice shaking.

I want to tell them the truth. Say Sans is a werewolf and all about last night. Tell them he ran away, wanting to protect us.

I open my mouth to say these things.

'Sans is dead.'