Amidst the anxieties of preparing for his final year in high school, film club cameraman Mao plucks up his courage and asks his boyfriend Hisashi to take a big step forward in their relationship. But what seemed like a great idea at first leads to a whole series of other questions that leave Mao at a loss and the two at a crossroads. And just when they most need some quality time together, Mao and Hisashi are forced to split up for a school field trip that threatens to disrupt their connection—and attracts unexpected attention from a clandestine figure lurking in the shadows.