For Sachiko and Masato, it seems like only yesterday that their children, Hikaru and Kanon, were little. But these days, Kanon is about to start elementary school, while Hikaru is getting out into society and going to junior high by bus. Time may fly, but in the outside world, some of Hikaru's actions that were acceptable at home or in his elementary school Special Ed classes just aren't anymore. When one of these habits creates chaos during the morning commute, Sachiko has to find a way to clear up a serious misunderstanding with Hikaru's fellow commuters and take steps to curb any behavior that might stand in the way of Hikaru living in the world as ""a cheerful, working adult."" Furthermore, dealing with the negative attitudes that others - including her mother-in-law - have about Hikaru begins to take its toll on Sachiko, especially with Masato occupied at work. Will the stress of facing new challenges presented by Hikaru's autism drive a rift between the two?