Himari Kino is a cheerful and outgoing girl who is able to make friends with anyone she wants. When she enrolls in high school and attends the freshman opening ceremony, Himari falls in love with Yori Asanagi, a reserved upperclassman, during Yori's band performance. After the show, Himari blurts out her love, but Yori is inexperienced when it comes to romance. Yori, who did not expect this outcome at all, looks for answers from her friends and music. She decides to respond to Himari's confession, and to her surprise, Yori discovers that Himari fell in love with her music and performance rather than Yori as a person. Despite the shock, Yori desires to make Himari truly fall in love with her. The duo spend time together after school on the rooftop, where Yori usually plays her guitar with hopes to change Himari's feelings for her.

Set in Tokyo, it's January 29, 2030. High-frequency resonance is observed in the vicinity of Tokyo, and the red fog rolls into the city. Those who hear the sound, humans and animals alike, pass out, losing consciousness. Everything shuts down in Tokyo, believing that the fog is carrying an unknown virus that causes an epidemic. However, six days later, after the incident, people wake up as if nothing happened. After that, Tokyo's sealed-off city sections gradually return to normal. However, since the high-frequency resonance, some "bizarre events" start to happen, and people find themselves being pulled deeper into more mysteries. Meanwhile, young people start to become aware of themselves and release their power hidden in their blood, discovering themselves as "vessel of wisdom blood." Together, being led by something unknown, they meet, communicate, and face the unavoidable circle of fate, sacrificing their own lives. (Source: MAL News)

A few months after the events of Steins;Gate, Rintarou Okabe and his group of friends are invited to tag along with their acquaintance Faris NyanNyan, who is participating in a Rai-Net battle event in the United States. There, they meet up with an old colleague: Kurisu Makise, who has been recalling fragmented memories of events that happened in the other world lines in the form of dreams. She confronts Okabe, questioning him as to whether these events—particularly the incidents between the two of them—did indeed happen. [Written by MAL Rewrite]

High school student Aoi Aioi lives with her elder sister, Akane, after a tragic accident took their parents away 13 years ago. Because Akane has since been taking care of her single-handedly, Aoi wants to move to Tokyo after her graduation to relieve her sister's burden and pursue a musical career, inspired by Akane's ex-boyfriend Shinnosuke "Shinno" Kanamuro. Shinno was part of a band until he left for Tokyo to become a professional guitarist after the sisters' parents passed away, and he was never to be seen again.

One afternoon, while Aoi practices her bass in a guest house, she gets startled by the 18-year-old version of Shinno from 13 years ago! As if by coincidence, the current 31-year-old Shinno also returns to the town, but he has changed drastically. There are now two Shinno's in existence, but why is the Shinno from the past present?

Sora no Aosa wo Shiru Hito yo revolves around these four individuals as they confront their inner feelings toward each other and make decisions that will affect their lives from here on out.

[Written by MAL Rewrite]