“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.

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.

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!

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.