*HANAHAKI DISEASE!* In the tranquil embrace of their Tokyo high school's Sakura tree, Nao and Aya forge a bond that transcends friendship. Amidst whispers of cherry blossoms, their lives intertwine with laughter and dreams until Aya's unexpected illness casts a shadow over their sanctuary. As they navigate the trials of illness and uncertain futures, their story unfolds with resilience, love, and the poignant beauty of fleeting moments beneath the Sakura's delicate petals.