A passionate photographer named Haruto finds himself captivated by a warm-hearted young hairdresser, Misaki. In an unexpected twist, Misaki shares that Haruto was her very first client, a revelation that endears him to her even more and sparks an instant connection. Taking a leap of faith, Haruto omits some truths about himself, referring to himself as a photographer, which further fuels his growing affection for her.
As Haruto continues to visit Misaki for haircuts, their bond deepens, leading Haruto to gather the courage to ask her out on a date. However, fate has a different plan; as he turns to speak to her mid-haircut, he inadvertently causes Misaki to accidentally clip the tip of his earlobe, resulting in a dramatic scene where he bleeds profusely and loses consciousness.
Days later, a distressed Misaki seeks out Haruto to express her apologies for the mishap, and during this encounter, he seizes the opportunity to revisit the topic of a date. To his delight, she agrees, but this budding romance faces scrutiny from Misaki’s overprotective older brother, who is determined to safeguard her well-being.
Their first date amidst the enchanting cherry blossoms becomes a pivotal moment for both. Haruto finally confesses he has not been working as a photographer and is entangled in a period of uncertainty about his future. Misaki's reaction is fierce; she urges him to chase his dreams relentlessly, emphasizing the need for resilience in the face of obstacles. Inspired by her words, Haruto resolves to transform himself into someone Misaki can be proud of, leading him to secure a position at a photography studio and putting in the hard work necessary to realize his ambitions. This determination eventually leads Misaki to agree to another date, and they embark on a passionate relationship, enjoying each other's company more seriously.
However, their blissful relationship faces a harsh reality when Misaki falls gravely ill. Following visits to the doctor, she confronts a devastating diagnosis: progeroid syndrome, a rare ailment that causes her body to age at an astonishingly accelerated pace. With her condition extremely serious, Misaki has less than a year to combat the rapid deterioration of her health.
Overwhelmed by fear and despair, Misaki retreats from the world, withdrawing from Haruto's life entirely. In her absence, she fabricates a story about finding a new job while secretly battling her illness, leading to heartbreak for Haruto as he is left in the dark about her true condition.
Cared for by her devoted brother, Misaki's struggles continue as he desperately seeks treatments, even falling prey to unscrupulous clinics peddling false hope through expensive electromagnetic therapies. Despite their best efforts, the prognosis remains grim, and Misaki's physical decline shows no signs of slowing.
As time passes, Misaki's situation worsens, and Haruto, though still hurting, attempts to move forward with his life. He immerses himself in his photography work, channeling his pain into creativity, ultimately emerging with a deeper understanding of love and loss, and how dreams can die, yet still inspire resilience in the face of adversity. Through these trials, both Haruto and Misaki learn about the weight of hope and the importance of cherishing love amidst life's fleeting moments.
