The fourth season of FLCL, and sequel to FLCL Alternative. It centers on three teenagers who graduated and have started working. The CGI anime will have a theme of the feeling of being an adult.

Evil spirits are drawn to Requiem Street in order to be destroyed there. Requiem Street is a place where spirits and humans coexist; not all humans are permitted entry. Only users of rare souls who have guardian spirits are allowed inside. Xia Ling was simply an ordinary university intern until an unexpected encounter changed everything in her life. Can you work with your guardian spirit to survive in this world filled with malevolent spirits?

The player Dongdong mistakenly entered the game world "Azure" and changed into the skeleton, the weakest wild creature. The unidentified Dongdong used his years of gaming experience to amass a band of wild monsters early on. He met the main character Bubble, made a deal with her to become her strongest pet, and then set off on an amusing and thrilling adventure with Bubble and his new pals in "Azure." The phenomenon of NPCs and wild monsters in the game gradually awakening and yearning for the human world was also identified at this time by Dongdong. To learn the truth and get back to your regular life. The main character group, lead by Dongdong, as well as awakened NPCs, regular players, game developers, and other entities started to debate how the two worlds were connected.

As the deskmate of Ai Mie, Kaede Komura always has his attention fixed on her. Attracted by her cute charms, all he wishes for is that she would look at him with those beautiful eyes beneath her glasses. But just a few days after making her acquaintance, Kaede notices something different about Ai: her eyes are squinting and her glasses are missing. Nonetheless, he still finds her adorable! Unexpectedly, Ai has a tendency to forget her glasses. Having terrible vision, she has difficulty going through her day at school. Thankfully, Kaede is more than willing to help her. As Ai starts relying on him, Kaede's feelings for her grow even more. Likewise, despite her short-sightedness, Kaede slowly becomes the person Ai always hopes to see.