Popular anime series "Free! Iwatobi Swim Club" will revisit the cast's middle school days in the upcoming movie "High Speed! Free! Starting Days," and you can meet some of the new characters in the brand new trailer!

On Sunday, YouTube channel KyoaniChannel uploaded the trailer for "High Speed! Free! Starting Days." In addition to seeing the return of fan-favorites like Rin, Nagisa, Rei, Mokoto and Haruka, there are also fresh faces in this prequel movie.

Meet Nao Serizawa, "the third-year student manager of the Iwatobi Middle School swim club who serves as Haruka and the others' instructor."

According to Anime News Network, he will be joined by Natsuya Kirishima, the third-year-student student captain of the Iwatobi Middle School swim club. He is the older brother of Ikuya Kirishima, a first-year whose forte is the breaststroke.

Reportedly, "High Speed! Free! Starting Days" is inspired by the second volume of the "High Speed!" light novel series by Kōji Ōji. According to CrunchyRoll, it is directed by Yasuhiro Takemoto and will hit Japanese theaters Dec. 5, 2015.

"Haruka Nanase feels something special when he touches water," reads the film synopsis according to Kyoto Animation.

"The medley relay was the last competition he was able to participate in during elementary school. Haruka, along with Makoto Tachibana, Nagisa Hazuki, and Rin Matsuoka, saw something they'd never seen before. In spring, with the cherry blossoms in full bloom, Haruka moves on to Iwatobi Middle School with Makoto and starts a new life. Both enter the swim team, and plan to compete in the medley relay together with Asahi Shiina and Ikuya Kirishima. All four students have different objectives and ways of thinking, and different baggage they're carrying, and so their practice for the relay hasn't been going well. What is required to make a team? What does Haruka, whose heart is trapped in the medley relay of the past, think during this new event?"