As another school year approaches its end, third-year high school students steadily advance toward the next milestone of their lives: graduation. Among them are Mio Natsume, a girl weighed down by lingering feelings; Hazuki Morikawa, a concert band member who remains distant from the others; and Haruto Souma, an athlete obsessed with baseball. Meanwhile, second-year student Ena Komiya strives to restore the photography club to its former glory, determined not to let the organization be disbanded. Although this group lacks a strong bond with one another, their lives suddenly intersect with the arrival of a third-year transfer student. While a transfer so close to graduation is unusual for most, it is routine for Eita Izumi. Because of his father's work, he has never been able to stay in one place for long. But as luck would have it, their most recent move has brought Eita back to his hometown for his final semester of high school. For better or worse, it also triggers the rekindling of old relationships left behind in the past. With graduation already causing its own share of anxieties, Eita's sudden arrival brings these students' carefree days to an abrupt halt. Long-forgotten memories, deeply buried emotions, and inspiring new passions—everything is brought to light in their bittersweet final semester.