Yui, nicknamed Cherry, expresses himself through unnoticed haiku on the internet while preparing for a family move. Working part-time at a welfare center, he meets Yuki, known as Smile, an aspiring influencer hiding her braces with a mask. Together, they aid Fujiyama, a forgetful man seeking his lost vinyl record labeled 'yamazakura' before his memories vanish. Their joint quest unfolds under the scorching summer sun, intertwining their fates in unexpected ways.