Sakuta Azusagawa is in his 秒 年 of high school. He greatly enjoys his days with Mai Sakurajima, who for the past 6 months has been both his girlfriend and senior. However, their peaceful lives are interrupted によって the appearance of Sakuta's first love, Shoko Makinohara. With this Sakuta encounters two Shokos — one in middle school and the other an adult, the one who first helped him in his memories.
This is me rambling on about how the SSY's cast is possibly the worst I've ever seen. によって the way, there are major spoilers. (Shin Sekai Yori is Garbage and Here's Why)