“Welcome to the planetarium! I’m Yumemi Hoshino, and I’ll be your guide.” An abandoned planetarium in the middle of nowhere. A lovely guest pays a visit, and timeless memories illuminate the night sky. The story of a small miracle begins.

Ryou Fujibayashi gathers with some of the other girls to discuss their personalities. There must be a way to improve her standing among the cast! Also, the mystery of the title of this anime is solved.

“That was a sight to behold...” Club activity is the centerpiece of school life. Liberal-arts-oriented clubs are great too, but sports-oriented clubs are the most exciting. Youths battling for their pride and ideal. Ah, the springtime of life.

It's swimming time! Naturally, the boys can't stop trying to take a peek at what their female classmates look like in swimsuits. However, something unnatural is going on with the sizes of the girls' bodies... Literally.

Even in this world, Yukito is broke. Fortunately, he found a place where he can legally show off his talents to make money. Unfortunately, nobody seems to be interested. Yukito decides it's time to take matters into his own hands.

Elder siblings gather to discuss an obvious truth: there is nothing wrong with being absolutely obsessed with their respective little sisters. But the discussion naturally transitions to whose little sister is cutest, resulting in rising tensions...

Elder siblings gather to prove an obvious truth: their love for their respective little sisters is the strongest. Naturally, the best way to do this is through baseball.

What are soulmates? Two people bound by fate? Love? Blood relations? Or... similar voices?

The protagonists of the five Key franchises gather to discuss the hardships they face. It isn't easy being a hero surrounded by beautiful girls! No, really, you don't understand.

The school is preparing for a festival! However...

The Kaginado Academy Carnival begins! The space-time continuum is completely ignored to allow several miraculous encounters.

The Kaginado Academy Carnival Arc enters its third and final episode! The long-awaited beauty contest begins, bringing the event to a powerful climax. But it's not the climax anyone expected.

Characters from another series join in, pushing the plot forward into a new chapter. Or so it seemed. First, let's hear what Hijiri and Sakura have to say.

The Afterlife Battlefront is here, and they're convinced that this whole KAGINADO show is some sort of cruel conspiracy. They have evidence to prove their assertion. Or, at the very least, Yuri thinks she does.

Despite seeming to enjoy school life at the Kaginado Academy, Yuri and the Afterlife Battlefront are still determined to tear the whole place down. Yuri hatches another plan.

Everyone is going to the beach for summer school. They are all travelling by bus on a narrow mountain road cutting through a dense forest. What could possibly go wrong?

The students, adult chaperones, and failed hijackers arrive at the beach and begin their designated beach activities. It's swimsuit time!

Yuri decided to tap into the rebellious energy of everyone at the academy through the chaotic power of rock and roll, which would disrupt the status quo and summon a god.

No more beating around the bush. It's time to determine which Key character is the strongest in single combat! The Key 1 Grand Prix tournament arc begins!

Key franchise heroines go through a lot of hardships, but not during their secret pajama party! Here, the heroines are free from worry. Well, at least the main heroines are.

It's student council election season! Many students are running for president, which is rumored to be a position that grants godlike powers for some reason.

The election season rages on, with more and more people running for president. Can Yuri win the election and become a god? Do the others in the Afterlife Battlefront even care anymore?

The moment of truth is near. Who will win the presidency? Will the winner actually gain godlike powers? Can Yuri find true friendship and happiness? The votes are in!

With the chaotic election arc over, life returns to normal. But in a world whose very existence is a miracle, normal is never boring.