Trivia / Borderless

• The Cast Showoff: Yui Kobayashi (Kotone) has actually played the piano since the age of four and also plays the saxophone and guitar.
• Dawson Casting: Kyoko Saito (born in 1997) was around 24 years old during production and played high school student Kiri; she is older by two years than Yui Kobayashi, who played the college student-aged Kotone. Hikaru Morita (Nao) was also already 20 years old (born in 2001) at the time.
• Playing Against Type: Kyoko Saito, known for her Book Dumb persona in Hinatazaka46, plays an intelligent aspiring author.
• Production Posse: Ichirota Miyakawa (Mr. Ichihara) became a proud Hinatazaka46 fan after they first worked together on Re:Mind. Takayuki Hamatsu (Mr. Yatsuji) has previously also appeared on other shows with Nogizaka46 members.