Naota is a normal Japanese 6th grade boy (although a little cynical), but when his older brother leaves for America to play baseball, his brother leaves his 17 year old girlfriend Mamimi behind. Mamimi is sending mixed signals and advances to Naota, and he doesn't know what to do about her. But to make matters worse, Naota's world is totally turned upside down when he is run over by a woman on a Vespa. During their first encounter, she hits him over the head with her guitar, which then causes a horn to grow out of his forehead. She calls herself "Haruko" and her presence changes Naota's life to even further insanity.

[Source: Anime News Network]

Many years have passed since Naota and Haruhara Haruko shared their adventure together. Meanwhile, the war between the two entities known as Medical Mechanica and Fraternity rages across the galaxy. Enter Hidomi, a young teenaged girl who believes there is nothing amazing to expect from her average life, until one day when a new teacher named Haruko arrives at her school. Soon enough, Medical Mechanica is attacking her town and Hidomi discovers a secret within her that could save everyone, a secret that only Haruko can unlock.

But why did Haruko return to Earth? What happened to her Rickenbacker 4001 she left with Naota? And where did the human-type robot ‘Canti’ go?

[Source: Adult Swim]

The series centers on the misadventures of 17-year-old Kana, a high school junior who spends her days hanging out with her besties, Mossan, Hijiri, and Pets. They live unremarkable lives, until the day a Mecha falls out of the sky, along with a strange woman named 'Haruko.' Her plans for Kana and her friends involve the force known as 'ATOMSK.' Kana will have to risk everything to decide whether or not to help… like she really has a choice!

[Source: Turner]

Prequel to the original FLCL.

The youngsters accept the decline of the city as part of their reality until Haruko throws the city into chaos.

Two rebellious high schoolers break into the mysterious Tsuganei tower on a mission to save the world.

[Source: Adult Swim]