AllMovie

Saeki Koushirou is a wedding planner who immerses himself in the loving plans of others in order to distract himself from his own heartbreak. After his girlfriend leaves him, there is nothing left in his life but his distant father, since his mother and sister left him years before. A chance meeting with a high-school girl on a train, however, changes his life forever. An instant connection sparks between them, but there are more complexities to their potential relationship than their age difference: she is Saeki's sister, the one he hasn't seen since he was a child, and she will be moving in with he and his father. This simple coincidence turns into a tumult of turmoil as both of them must confront their own confusion, shame, passion, and values, and answer this question: is it worth it to obey the laws of society if it means a life without happiness?