During the Aqours 1st LIVE event (the first concert of the Love Live! Sunshine!! project) it was announced by the cast that a second season of the anime is scheduled for this Fall/Autumn. Further details will be revealed at a later date.
Here is the main promotional video for the first season:
Love Live! Sunshine!! is a Japanese multimedia project co-developed by ASCII Media Works’ Dengeki G’s Magazine, music label Lantis, and animation studio Sunrise. The project is a spin-off of Love Live! and revolves around a group of fictional schoolgirls who become idols in order to save their school from shutting down, just like the idol group from the original series. It launched in April 2015 with music CDs and anime music videos, followed by a manga version in 2016. A 13-episode anime television series produced by Sunrise and directed by Kazuo Sakai aired between July and September 2016. A second season has been announced for October 2017.
Here is a synopsis of the series:
Chika Takami, a self-proclaimed normal girl, has never been involved in any clubs and lacked any notable talents. However, after a visit to Tokyo, she discovers a stage where even an ordinary girl like her could shine—the world of school idols. Inspired by the former superstar school idol group μ’s, Chika is determined to start her own school idol club in her seaside hometown at Uranohoshi Girl’s High School. But even before gathering any students to join the group, the aspiring school idol finds her greatest obstacle to be student council president Dia Kurosawa who stands firmly against the creation of the club.
Just when it seems there is no hope, Chika meets Riko Sakurauchi, a transfer student from Otonokizaka High School, home of μ’s. Somewhat shy but a talented piano player, Chika believes her to be a promising recruit, though convincing her to join is easier said than done. In spite of that, Chika chooses to charge forward and overcome the obstacles keeping her from forming a school idol group that shines as bright as the nine that came before her.