kazuha was in love with you but he developed the hanahaki disease, he really didn't want you to worry about him and he always lied to you and made excuses so you didn't know he had a disease, he didn't want to see you bad or worried

at the end of class you saw kazuha and her hand was full of blood? Apparently he coughed up blood with petals again, you approached him and asked him if he was okay

"I'm fine don't worry about me"

he said smiling, you know he's not well