When you look up at the sky, what do you see? A blue sky? Freedom? A hopeful future? The people of Tokyo see none of these. Instead, an ominous alien mothership looms overhead, engulfing the city skyscape. Three years ago, they came. The arrival of the "Invaders" sparked the greatest war humanity had ever faced—one that threatened to end the world. The Japanese government scrambled to fight the Invaders. Weapons were mass-produced, sparking controversy and pacifist movements. That day, everything changed. And yet, nothing has changed. Kadode Koyama and Ouran Nakagawa live their final days like they always have: going to school, playing with friends, and doing what any carefree high school girl would do. As they grow up they come to learn what it truly means to be an adult, in a world where adults seem to be demons who only deceive and destroy. They come to learn the real threat to humanity is not the Invaders, but humanity itself.

In the vast world, planes converge and numerous races thrive. A gathering of extraordinary talents unfolds, where one after another, supreme beings from the lower planes come forth. In this boundless realm, they weave captivating legends that inspire admiration, pursuing the path to dominance.

Back from his journey across Japan, Yuuta Takemoto reminisces about his college life so far. He has matured significantly since his second year and is motivated to move forward. Feeling more confident than ever before, he finally confesses to Hagumi Hanamoto, the girl he has been in love with since their first encounter. However, Hagumi has been confused by her attempts to understand the mysterious Shinobu Morita. Hiding behind a playful demeanor, Morita may be the most burdened by his own potential. Meanwhile, Takumi Mayama has become a full-fledged working adult and has landed Ayumi Yamada several pottery orders through his company in an act of friendship. The five youths continue to face individual hardships in academics, work, love, and friendship as they push each other toward the paths that they are destined to walk. [Written by MAL Rewrite]

Violinist Kiyora Miki meets with Shinichi Chiaki, Megumi "Nodame" Noda, and their two friends to visit world-class conductor Franz von Stresemann; upon arriving at his residence in Vienna, they discover that the maestro has escaped to Japan. As they make the most of their wasted trip by visiting important landmarks in the historical capital of classical music, Kiyora has a confession to make: she has not seen her boyfriend Ryuutarou Mine for an entire year and is still busy preparing for an international competition in Paris. Chiaki and Nodame promise to attend the final round, but when the two are back in Paris, they receive an unexpected guest... [Written by MAL Rewrite]