It's probably a love story between a depressed boy and a terminally ill boy!
--"Why, why do you want to be with me?"
--"I see hope for the future in you, get well soon"
--"Then why did you leave me..."
--"You have to be good and don't give up..."
Story - End
Intention: Fight against the disease, persevere, come on＾0＾~