(What I heard is that basically a disease that will kill you. You cough up blood petals and the only cure for it is: you confess your love and they love you back. Or get a surgery that will make you lose feelings for that person.(idk about your emotions for everyone so that maybe counts.) Idek if it's real but imma do this type of chapie so yea.

YOUR POV

You saw Sans together with Frisk. You hated it. They both laughed as they both kissed each other.

You wanted them to be happy. So you left. You started coughing petals often with blood on it.

You went to alphys with mettaton. Turns out you had the hanaki disease. The only cure for it is to confess to Sans and maybe he might love you back? Or get surgery that will makes you feel no emotions.

If you choose to take the surgery

"Ok I will." You said. Alphys nodded. "Good luck
Y/N."

-after the surgery-

You felt dull when you woke up. You couldn't feel. And that's that. Sans and Frisk were still together but then you didn't care.

If you choose not to take the surgery

"No way. I want to die then not being able to feel love." You said.

"B-But you need to. Your running out of time."

"Sorry Mettaton But I cant." You said. You stood up. "Ok we will try to find more ways besides the surgery ." Said Alphys.

"Ok thanks alphys." You said as you walked away from the lab. You sat on the bench in the waterfall.

You saw Sans and Frisk looking at each other lovingly. You smiled. Long as they are happy, you are to... right?

"Oh hey Y/N!" Said Frisk. Sans has been avoiding you lately because of Frisk. They both are inseparable. You waved but then accidentally coughed a petal with blood on it.

Frisk was horrified. "Y/N? Are you ok?" You nodded. "Don't sweat it. I'm fine." You saidad you stood up. Your time was up.

"Well I better perform my funeral, before I past-a away." You joked.

"Wait why?" Sans asked looking concerned. "I have the hanaki disease. I'm not take the surgery for the cure because I wouldn't feel. Because I..."

"Love you..." you mumbled the part you didn't hear. But Sans eyesockets went empty. He seem to hear you loud enough.

Frisk was confused.

You ran and teleported. You were out of breath. "Seems it's goodbye forever." You said as you fell asleep.

"NO Y/N!" You heard Sans voice ahead. You smiled softly.

"Love you Sans." You said.

-funeral-

Sans gave flowers to Y/N's grave as mettaton kept glaring at him.

"Stop blaming Sans he never knew about the disease in the first place!" Said Author and Frisk in unison.

(Protection Sans Squad Defense from Readers Hakani disease) xDDD

"BUT HE SHOULDVE CONFESSED!" Mettaton shouted. "Yeah like you never confessed to papyrus." Said Frisk.

Mettaton face palm with pink. Toriel soothingly rubs Sans back.

"I love you Y/N. Don't forget."

A/N

This is sad.