"We're starting a band!" Yuu's casually spoken words gave Fuuka the idea to start a band. Yuu and Mikasa are dragged into the plan, and the three of them start a light music association. For starters, they need money for instruments, so they decide to stay at a beach house over the summer and work part-time there at Tomomi-sensei's suggestion. But the owner, Yahagi, is Yuu's least favorite type of person, causing to struggle with the job that requires serving customers.

Yuu spots Fuuka in the hall and is about to talk to her, but then he notices she's crying. He follows her eyes and sees that she seems to be looking at their good-looking classmate, Mikasa. After school, Yuu ends up on pool-cleaning duty with Fuuka and Mikasa, but he can't stop wondering about their relationship. Meanwhile, Koyuki Hinashi, a childhood friend that Yuu lost contact with after she became a popular singer, finally calls Yuu for the first time in years.

Yuu wrote an original song in an attempt to bring Fuuka back to the band, but she persistently refused to meet with him. Now, as their growing popularity online has earned the attention of the HEDGEHOGS members, they've been invited to play at a live club again. The members have no choice but to practice their new song with no vocalist, but Yuu still isn't willing to give up. Can he get his feelings through to Fuuka?

"I was scouted, so I'm thinking of making my solo debut." Fuuka's sudden declaration shook the members of The Fallen Moon. They had successfully completed their first gig and were determined to make their own legend, but they can't be a band without a vocalist. Despite their lingering regrets, Sara, Mikasa, and Nachi set off to walk their own path. And after agonizing over this change, the answer Yuu arrived at was...

Fuuka instantly declined the offer to make her solo debut, but she continues to struggle with the lyrics for the band's original song. A concerned Mikasa tries to reach out, but Fuuka is unable to verbalize her true feelings. Yuu also becomes worried and calls her, but his kindness only makes her feel worse. With their first gig only days away, what feelings will Fuuka express in her lyrics?

The introverted Yuu Haruna has moved to Tokyo to live with this three sisters after their parents left to work abroad. While passing through the local shopping district, Yuu's eyes are riveted on a TV screen in a store window when a girl comes running up the street and crashes into him. That is how he met the girl who seemed to be wrapped in a summer breeze: Fuuka Akitsuki. Their first meeting goes downhill when Fuuka mistakes Yuu's intentions with the smartphone in his hand, and on top of that, he then finds out that they'll be in the same class at his new school...

After years on the fringe of society, Panties finds himself in the middle of a conspiracy when he successfully hacks into Kondo’s phone and learns the truth behind Careless Monday.

Takizawa, Saki, and Micchon pay a visit to Panties, a reclusive geek who might have the skills to repair Kondo’s phone. Across town, Ohsugi doesn’t like what he finds after looking into Takizawa’s identity.

Ohsugi’s life is on the line as Takizawa and the Johnny Hunter engage in a game of cat and mouse. When they finally meet face to face in Kuroha’s exquisite lair, it becomes clear that nothing is as it seems.

Takizawa considers investing in the software created by Saki’s club, Eden of the East. The deal could benefit everyone involved, but they must tend to other business first - Ohsugi seems to be in grave danger.

The beautiful and lethal Seleção Kuroha enters the picture. Meanwhile, the actions of two wildly different men - a stranger on the street and the Prime Minister of Japan - prove the extent of Takizawa’s influence.

During a visit with the respected Dr. Hiura, Takizawa finally learns the rules, expectations, and penalties that come with the role of a Seleção. He also learns how impossibly difficult it’s going to be to survive.

At the shopping mall he calls home, Takizawa receives a violent visit from Kondo. Their next meeting goes just as poorly - the detective, bleeding in the street, reveals monstrous actions from Takizawa’s past.

Takizawa learns some unusual facts from Juiz: if he calls with a request, she’ll make it happen - quickly. She also reveals that billions of yen are credited to the device - and Takizawa has to spend it.

As missiles fill the skies above Japan once more, Takizawa must rush to prevent a catastrophe far greater than Careless Monday. He has the resources - but does he have enough time?

After finding out Mr. Outside’s true identity, Takizawa learns that those responsible for Careless Monday are planning an even greater attack - but the most disturbing revelation concerns his missing memories.

Saki’s visit to the U.S. takes an odd turn when she meets Takizawa in front of the White House. He’s naked and armed with a gun. He has no memory and may be a terrorist. And he’s joining her on a flight to Japan.

Amupura and Janahn Ghalan’s evening party draws near. They pay the agency a visit.

Largonkin and the Jushikiist agency vow to avenge the people slain by Great Magatsushikis Amupura and Janahn Ghalan.

A man named Zhuo Lu appears at the hostage exchange where Remedius was to be brought home.