help me find this drama please

i just watched the video on facebook and i lost the fb page where it was posted so ill just describe what i saw in the video. the girl has long hair and long bangs almost half of her face is hidden and the guy is sick. they are still in highschool, the girl was being bullied because of her hair. they somewhat agreed to be together for 365 days because the guy has cancer if i wasn't mistaken. i think its japanese drama please help me