MHA: Samurai Sentai Shinkenger

Origin

Izuku sat in his room studying for exams, even if he's still wants to get into UA's Hero course, as he was studying, his mother walked in. "Sorry to bother you Izuku, but can you help me tidy up the closet?"

"No problem mom." Izuku said, wanting to be helpful. The closet was filled with clothes and heavy boxes but it was relatively easy to clean out. As they were moving everything, Izuku noticed something in the corner: A small black chest with a gold symbol on top. "Hey mom, what's that?"

"Huh? I don't know." She didn't know what the box was, for all she knew it was one of Hisashi's possessions.

Izuku decided to take the chest to his room to look at it further, upon opening it he found several small items: A small pentagonal box, a red disc, a small flip phone and a scroll. Izuku first looked at the box, it had a mechanical look to it and had the kanji for fire (火) on it. He then looked at the disc, it had a repeating pattern on it but he couldn't exactly make it out.

He then looked at the flip phone, it was a bit bulky but nothing out of the ordinary, so he flipped it open. nothing weird at first glance but after applying slight pressure at the sides, the phone unfolded and what appeared to be the end of a paint brush popped out at the top. "Oh jeez what did i do!?" Izuku jumped back from the sudden transformation, after a second Izuku noticed a glow coming from the brush. He made a brushing motion with the phone and a holographic streak of red came from it, Izuku then looked at the pentagonal box and decided to paint the kanji on it. Upon completing the symbol, it solidified with a white outline. Izuku then went for another stroke, but instead, he was engulfed in a bright red light.

When his eyes adjusted, Izuku looked down to see he was now wearing a strange outfit: red boots with a black stripe at the top, black lower body, golden belt with a circular buckle, a sword in a sheath on his left, white gloves with a black stripe at the top, a black stripe going down the red torso that resembled a gi and the same symbol now in gold on the left of his chest. Izuku looked at a mirror on his nightstand to see he was now wearing a helmet with the kanji now becoming a visor.

Then Izuku began panicking. "Ahhhhh! What the!?" He then began trying to get the suit off of him, grabbing at the fabric and trying to find a way to remove the helmet.

"Izuku!? Is everything alright?" In his panic, the noise alerted his mother that something was wrong.

"Oh! Uh everythings fine!" Everything was not fine but Izuku knew that if she walked in and saw him like this, she'd probably pass out. As her footsteps approached the door, Izuku got desperate. "Ga! How do I get this thing off me!? Go away! vanish! Power down!" in a red flash the suit disappeared.

"Izuku!?" Inko opened the door to see her son flustered. "Izuku!? What happened!?"

"I- uh- saw a spider..." Izuku wasn't gonna tell her what happened, especially if he didnt know what happened himself. After she left, Izuku looked at the final item in the chest, the scroll: He unrolled it to reveal the same symbol on the chest and outfit, below it was a set of coordinates. After a quick internet search he found that they led to the forest surrounding Musutafu, Izuku decided that the next morning he'd get some answers.