you, sae, rin are younger siblings, you are their last sister, your old brother rin has been sick lately, it turns out that rin is hiding his illness, namely cancer, rin is hiding it from both of you

right now you and sae are seeing how weak rin is lying in the hospital

sae:"stupid.why are you hiding this?! said sae by saying while crying sobbing

rin:"I'm sorry I kept this a secret from you two"

while you just hugged him then rin smiled