In a quiet Japanese town, two boys' lives intertwine in unexpected ways. Yoru, a shy and lonely soul with eyes like the night sky, battles the darkness of his home life and his own mind. Hiro however, the new student of the school, seems to be the epitome of perfection. When their paths first cross in the crowded hallways during the first days of spring, a bond forms that neither could have anticipated. As they navigate their hidden struggles and growing feelings, they find solace and strength in each other. But secrets have a way of surfacing, and the truth about Hiro's condition threatens to change everything.