You've always attended the all-male Green Academy, along with your friends Ijuuin Tadatomo, Tenjin Taizou, and Ichibanboshi Hikaru. The four of you have been together for years, fooling around and constantly talking about getting girlfriends - though as boys who haven't interacted much with women outside of family, you really don't know much about the subject.

Green Academy's enrollment has been declining for years, so the board of directors decided to merge with their sister academy - an all-female school facing similar problems. Before proper plans could be made, the all-female Green School burned down in a mysterious accident, making the merger urgent rather than optional.

The news spread like wildfire through your school: "Women will arrive." For students who had only known an all-male environment, this was earth-shattering news.

The day finally arrives. Your friends Tadatomo, Taizou, and Hikaru can't stop talking about how they'll have the best time of their lives with so many girls. Each expresses their vulgar excitement in their own peculiar way as you all wait for the arrival.

When the bus carrying the female students pulls up, you watch with your friends as the girls enter the academy grounds while teachers try to keep the male students at bay, clearly anticipating trouble.

Like everyone else, you're curious to see the new students, so you accompany your friends to spy on the welcoming ceremony the teachers have organized.

Among the arriving group, you notice there appears to be a new female teacher as well.

Tadatomo immediately begins making obscene gestures while imagining the new teacher.

You spot a pretty small girl with black hair who catches your attention.

"I want her to call me 'onii-chan' while I eat rice!" Taizou exclaims excitedly, bouncing around like a monkey.

Before you can look at the other girls again, Hikaru suddenly flies backward, knocked aside.

Standing where he was is a very attractive girl with striking red eyes.

"They had to be boys," she says with obvious disdain, looking directly at your group. "They're all the same."

"Sister, calm down," another girl says. "I'm sure these boys must have something good about them."

She glances at Taizou's perverted expression and says nothing more, simply bending down to place her cactus directly on his face and twisting it slightly.

As teachers begin approaching, Tadatomo orders a strategic retreat. "We split up!"

You flee north, eventually finding yourself in front of the huge, legendary tree on campus. Exhausted, you sit down to catch your breath.

A noise behind you makes you turn. A girl with beautiful green eyes stands there.

"You are......." she says, her eyes suddenly filling with intense emotion. "Really is it you?"

She seems about to rush toward you when someone grabs her by the choker around her neck.

The girl restraining her has blue eyes and reddish hair. "Midori, we must return to the ceremony," she says firmly. "You must not waste time on stupid things."

She begins pulling Midori by her neck toward the academy.

"NO, I must talk to him!" Midori insists, kicking her feet as she's dragged away.

The girls eventually leave you thoroughly confused. You never had any female friends in childhood, so there's no way that girl could recognize you. Something strange is happening.

You return to the academy, still thinking about the encounter, and meet back up with your friends.

Tadatomo, Taizou, and Hikaru are热烈 discussing their experiences and seem to have different ideas about how to proceed.

"Guys, pay attention!" Tadatomo says, pacing like a general planning a battle. "Today isn't just any other day. Today is the day destiny calls us to action. The new girls are our chance for glory!"

"Destiny indeed," Hikaru says with a dreamy smile, arms crossed. "That girl with purple hair and red eyes! She kicked me, but it was like my heart exploded. I have to find her. It's love at first kick!"

"I understand too, Hikaru," Taizou says, looking up at the sky with a dreamy expression. "There's a small black-haired girl, like an angel. If I could hear her say 'Big brother' while eating red rice... it would be perfect. I must find her!"

The three continue their heated discussion before finally deciding to split up. They all turn to you, waiting to hear who you'll accompany.