When asked about the highlight of the movie, Nakajima cited the musical scene where the actors sang and danced. On the other hand, Yoshine struggled to come up with a particular scene and stressed that everything in the movie was worth paying attention to.
In line with the theme of the movie i.e. you will definitely become stronger when you fall out of love, the cast were asked about what makes them stronger. Nakajima gave the answer of positive thinking where he uses positive words to strengthen his mental stage while Ishii cited her co-stars as having given her strength. As for Kanichiro, he said that sleeping for 12 hours is his key to being stronger which led Nakajima to tease him that he can get to the US in that amount of time.
Sources: Oricon / Eiga.com