Gunzou here, presenting my second Love Live Sunshine fanfic. Once again co-authored by GAT-X105VividPanzer. Comments and suggestions are always welcome~

Super Sentai Aqours Rangers! Chapter 1.

Ahh... Today is a fine day, isn't it? I, Kurosawa Dia, the student council president of Uranohoshi Girls' School, am resting inside the student council room. The gentle wind that passes through the window, the bright sunlight – it makes this place a small haven amidst the all the work and study – not to mention the difficult practice sessions by Aqours, the school idol group of the school that I am also in. But for now, I'll set aside all of that and enjoy this rare occasion… Wait. What's happening in the town below?

"GRRRRRRRROOOOOOOAAAARR!"

"HELP US! MONSTERS ARE COMING!" "RUN! RUN FOR YOUR LIVES!"

A monster with a round, orange shape and a head resembling a girl's head lumbered down at the running crowd. The leaf-like decoration in the monster's head fired beams unto them, hitting a few. On the top of a building, observing the whole scene were two otherworldly beings. One being has the head of an anglerfish, was laughing. The other being, a humanoid in black and gold armor, was watching silently.
"Wahahahaha! Our new weapon is very effective at terrorizing the people!" the anglerfish said. "Go on, my grunts, the Kayoborg has dealt the first blow! Seize the town!"
Four grunts suddenly appeared out of nowhere and somersaulted towards Kayoborg. More grunts went around the town.
"…You better succeed this time, Master Angler," the armored being said. "Lord Al Paca won't tolerate another failure if you do."

Back at Uranohoshi, Dia saw the smoke rising. Then she noticed a group clad in black running towards the school, chasing and throwing some civilians aside.
"What insolence! A group of delinquents are going to disrupt the order and discipline? Unacceptable! I shall confront them myself."
Dia immediately rushed down to the school entrance and asked the nearest student. "Tell me, what is happening here? The terrified student immediately recognized her."President! They said that monsters were attacking the town and some of them are heading this way! We better get out of here, or else…!"
Dia grabbed the student's shoulders and gazed sternly into her eyes. "As the Student Council President I ask you to rally the students and get them to safety. I will deal with this."
"B-but…"
"No buts! Do as I say, and fast!" Dia commanded with an air of finality.

As she blocked the way Dia got into a fighting pose, ready to intercept the incoming enemy. As they were speeding towards her they somersaulted and surrounded her in all directions. For a moment neither of them moved, anticipating whoever will make the first move.
"Come and get me! I will show to you what it is like to confront someone from the Kurosawa Family!" Dia challenged.
All of the grunts jumped at her. Dia ducked and rolled just before they pounce at her, making them collide with each other. The grunts, unhurt, changed their formation and faced her. "No, this might be hard to deal with!" Dia thought. "Attacking by numbers, I might not stand a chance against them!" Suddenly time stopped. Dia, who was paralyzed herself, was still able to speak.

"O chosen one, now is the time for your awakening," a voice echoed inside her head. Do as what I say, and you will have the power to defeat them."
"W-who are you? And what kind of power are you talking about?"
"You will see me soon. For now I will manifest myself as an amulet. Raise it and command it to transform. You will be given extraordinary speed and strength of a shark - one of the fearsome creatures in the ocean." the voice answered as the time returned to normal. The grunts that Dia was facing was preparing for another charge. Dia, remembering the voice's command, found the amulet hanging in her neck. She raised the amulet and it began to change color. "Transform!" Dia's body was surrounded by red glow as she transformed. Upon completion she examined herself. She was now wearing some kind of body-fitting red suit.

"T-this... is this what the voice meant? And I... feel the energy inside me..." The grunts, momentarily baffled at Dia's change, began their simultaneous charge at her.

Dia also charged towards them. "Anyway! I won't let you harm the school and the people! Today you will feel the wrath of Kurosawa Dia!"