Some warnings and disclaimers before you read:

I do not own anything about My Hero Academia and Sekiro.

This story may contain some self-harm and depression issues that you may feel uncomfortable reading.

I am suck at describing action scene (or describing in general) but I promise I'll try my best.

No smut scene (for the time being).

Reviews,comments and pointers are always welcome. This is my first fic so any help is welcome .

My vocabulary is kinda plain.

My OC, who is also the MC, might seem kinda weird.

Sekiro's knowledge is not required but if you want a better understanding of the skills, I suggest Youtube (I will still describe them).

I want to make this fic as entertaining as possible so there will be some gender-swap and harem (I know it's cringe but then again, this is for entertain).

Sorry for rambling, but now that those are out of the way, enjoy!


Everyone grabbed their own cases and headed to the changing room as soon as Kan-sensei left the class. Needless to say class 1-B was excited to put on there hero costume for the first time, especially when it means that they were one step closer to become a pro hero.


"It's exactly as how I described it, but did they need to put in a few extras?"

Aki quietly thought while staring at his opened case, inside was a hooded short-sleeve, black long coat folded neatly. Underneath it was 2 arm protectors, a long, black track paint with a demon half-mask that covers up to the nose.

"They thought I'm an assassin or something? At least they followed the mobility focus request."

After putting on his costume, Aki couldn't help but surprise at the shockingly light coat despite its look. He put the left arm protector back inside the case and put his prosthetic on his left arm, and hung the mask on his neck. Satisfy with his own costume, Aki put the case and his uniform inside his locker and headed to Ground Beta.

"It seems like you maggots have no problem with your costumes."

Kan announced loudly, looking at his well-dressed students who were excitedly talking with each other about their costume. Even though there were some complaints threw around about how the support company changed a few details on their own, overall everyone was happy with their own costumes.

"We are going to do an Indoor Battle Trial!"

He continued, "Villain-cleanup is usually seen out in the open, but statistically, the better part of it is an indoor job, since most acts of villainy are committed indoors. A dangerous Villain is one who lurks in the shadow."

Then followed up, "That is why for this training, you'll separate into 'Villain' and 'Hero' Groups for a 2v2 team battle. Any questions?"

Awase raised his hand and asked, "What about foundational training?"

"This is foundational training! Unlike the entrance exam, you can't just Smash your way through to win." Class 1-B's teacher explained.

"How do we determine who wins or loses?" Ibara asked.

"Why can't we smash our way through!?" Tetsutetsu questioned.

"How are we separating the groups?" Kendou raised her hand.

"Settle! I'll explain one-by-one." Kan said, before explaining, "For this training, we'll have the 'Villains' guarding a fake nuclear bomb that are set to deploy within time limit, the 'Heroes' must stop them before the time limit went out. If the 'Heroes' capture the 'Villains' or reach the bomb before time went out, they win. Likewise, if the 'Villains' capture the 'Heroes' or protect the bomb until time went out, they win."

"For the teams, we'll be choosing randomly from the lottery." Kan said as he held out a box with the word 'Lot' on it.

"Is it okay for the team to be chosen randomly like that?" Tsuburaba asked.

"If you think about it, Pros are forced to work with others all the time, so maybe this is for testing that." Monoma pointed out.

Everyone nodded agreely at Monoma's explanation before they proceed to draw out their own number in the lottery box.

Team A: Tsunotori Pony and Monoma Neito

Team B: Fukidashi Manga and Hiryu Rin

Team C: Awase Yosetsu and Kamakiri Togaru

Team D: Shishida Jurota and Kaibara Sen

Team E: Mochizuki Aki and Tokage Setsuna

Team F: Kodai Yui and Komori Kinoko

Team G: Kuroiro Shihai and Tsuburaba Kosei

Team H: Yanagi Reiko and Shoda Nirengeki

Team I: Honenuki Juzo and Tetsutetsu Tetsutetsu

Team J: Kendou Itsuka and Shiozaki Ibara

"All right, now that's the teams are chosen, let's draw the pairs to do combat!" Kan announced as he put his hand in two boxes,

First Battle: Team C (Villain) vs Team J (Hero)

Second Battle: Team I (Villain) vs Team A (Hero)

Third Battle: Team F (Villain) vs Team G (Hero)

Fourth Battle: Team H (Villain) vs Team B (Hero)

Fifth Battle: Team D (Villain) vs Team E (Hero)

"Team C, please proceed into the buildings and plant the bombs. Team J, wait outside, plan your attacks and wait for our cue to start. The rest of the students, follow us to the surveilance room."


"Kendou-san, do you perhaps have any plan for us to overcome this trial?" Ibara asked Itsuka as she clasped her hands together.

"Well, for starters, we don't know where will they place the bomb. I'm thinking that we scout the first 2 floors together. If the bomb is not there, we'll separate. Try to capture Awase and Kamakiri-san on the way if possible." Kendou told Ibara and received a nod from the Vine Heroine.


"So, who do you think would win?" Aki turned to Setsuna as she asked that question. His partner costume is a blue skintight suit with scale that hugs her body closely, not hiding the girl's curves.

"W-well, I think that the Hero Team is at the disadvantage since they have to locate the bomb on a time limit while fighting the Villain Team, and Shiozaki-san's Quirk is countered by Kamakiri-san." Aki said while trying his best to keep eye contact with the girl and prevent his eyes from looking down.

"Now that you mention it, we are in the Hero team so we have to locate the bomb as well. Got any plans, Mochi-kun?

"Mochi-kun?" Aki quickly asked his partner.

"Yeah! No offense, but Mochizuki-kun is quite a mouthful to say. Besides, Mochi-kun sounds cuter!"

"I sound like a dessert…"

"A dessert that I would gladly eat up." Setsuna licked her lips as she said.

At the green hair girl words, Aki's face turned redder than a tomato that caused Setsuna to burst out laughing,

"Man, you're fun to tease! I'm just joking, but I'm keeping the nickname." Setsuna smirked as she patted Aki's back, "back to the question, you got any plan?"

"I may have some, but it based from what I know about our opponents and I don't think it's much."


The first battle went as Aki's expectation. Regardless of Ibara's powerful Quirk, her vines were easily cut by Kamakiri's Blade. Awase's Quirk proved to be quite troublesome as he kept recreating another shield as soon as Itsuka broke one down. The Villain Team won by the time limit.

The second battle was over quickly. As soon as the battle starts, Tetsutetsu ran straight for Monoma and Pony. Monoma copied his Quirk and defeated him with the combine effort of Pony. They quickly defeated Juzo as soon as they found him. The Hero Team won by capture.

The third battle showed how cunning Yui and Kinoko were. Yui shrunk the bomb and hid it under one of Komori's mushrooms. The Hero Team could neither found the bomb nor captured the two girls in time. Villain Team won by time limit.

The fourth battle was overkill as Reiko and Nirengeki's Quirks were a perfect combination. Reiko manipulated multiple objects to hit the Hero Team along with double impact damage from Nirengeki was too much for Manga and Rin. They were quickly knocked out. Villain Team won by capture.

After the fourth battle, Aki and Setsuna waited in front of the building for the Villain Team to set up the bomb.


"Let's recap. You'll search from the top down while I search from the bottom up. But how would you get on top of this building?" Setsuna asked her partner as she did some streches to prepare for the upcoming fight.

"You'll see." Aki answered with a smirked.

"Indoor Battle Trial, commence" a robotic voice was heard booming through the speakers.

At the cue, Aki threw 3 shurikens at the top window to break it and grapple through it.

"If neither of us could find the bomb, just focus on taking down whoever you encountered." Aki told Setsuna through the earbud that was given.

Kaibara waited anxiously inside an empty room with the bomb. After quick discussion, they both agreed on a plan. Shishida turned on his 'Beast Mode' and searched for the Hero Team, while he defended the bomb inside this room. The plan was simple, but good enough. Kaibara knew that, yet he couldn't shook that worry feeling he had, and that window breaking sound from above didn't help calming his nerve, especially since he saw Shishida headed down towards the entrance.

"Setsuna, I found the bomb. 5th floor, at the end of the left corridor. Only Kaibara-san is here, any sign of Shishida-san?" Aki mumbled quietly through the earbud.

"Negative." Setsuna replied, "He might still be close, I'm heading to you now."

"Got i-" Instinctively, Aki jumped back, barely dodged a figure that lunged towards him out of nowhere.

"Mochi-kun!? What's going on?" Setsuna yelled.

"Shishida-san is here!" Aki said, before turning off the earbud.

"Shishida, what's going on- Mochizuki-san!?" Kaibara turned his attention at the commotion.

"I smelled someone strange, so I ran back here as fast as I could! Looks like my nose didn't deceive me!" Shishida explained with a wide grin on his face.

'So his senses are enhance as well." Aki thought as he drew out his katana and got on his stance.

"Well we have a 2v1 advantage here! Let's quickly take him down and find Tokage-san!" Kaibara yelled out as he activated his Quirk, making his right hand rotates at an unbelievable speed before he jumped towards Aki, trying to punch (drill?) his opponent.

Just as Kaibara's hand was about to reach him, Aki stepped forward, raised his left leg and used it to slam Kaibara's rotating hand down to the ground. Seeing Kaibara's back wide open, Aki stabbed his katana there. The damage wasn't fatal, but was enough to knock the Gyrate User out.

However, following Kaibara's attack was Shishida's fist. Didn't manage to react fast enough to deflect the Beast User's attack, Aki was knocked over to a wall, but he rolled away and stood up almost immediately.

"Not knocked out yet? You are stronger than your look!" Abandoned all the politeness from before, Shishida excitedly yelled out as he jumped towards Aki to trade blows.

In the watching room, no one could turn their eyes away from the fight. Shishida's merciless punches were being blocked by Aki, who used every openings he saw to strike back but it didn't do much, especially since Shishida's skin was slight harden in his beast form and Aki's katana is a practice sword that couldn't deal any major injuries to his opponent.

'Goddamit! There must be some ways to knock this guy out!' was the thought of the two fighters.

After a good 5 minutes of trading blows, the two distanced themselves from each other, but still keeping their focuses on the other one. Aki got into his stance, preparing to deal one final gambit strike. It looked like Shishida was about to do the same thing as well. Just as the two were about to jump at each other.

"Battle Ended! Hero Team Victory!" a robotic voice echoed throughout the building.

"What!?"

"Eh?"

Shishida and Aki let out a small gasp of surprise at the same faked a cough, turning both their attention towards the bomb location.

"You boys had your fun, but no one seems to pay any attention to the main objective." Setsuna stood next to the bomb as she said with an amused grin on her face.

After the announcement, Shishida reverted back to his human form. Apparently, turning into Beast Mode caused him quite a headache, so he went off first with Kaibara to Recovery Girl. Aki and Setsuna walked together to the entrance,

"Sorry to interrupt your fun, but the opportunity was too good to pass up." Setsuna apologised while giggling.

"N-no need to, Tokage-san. If not for you, we would have lost to time limit, so thank you."

"Aww, aren't you just the cutest!"

Setsuna let out her not so subtle giggle looking at her partner, who looked like he short-circuited.


After Kan dismissed them, 1-B went to their changing room and changed.

"Yo Mochizuki bro, what was that?" Aki turned, to see Tetsutetsu at his right stared at him with a gleam in his eyes.

'Our locker is next to each other huh?' Aki quietly sweatdropped before he asked, "What was what? And are these locker's talk going to be a regular thing?"

"Hell yeah! That move you used to knock out Kaibara, I mean! It was so cool!" Tetsustetsu said.

"Yeah, what was that? I mean I was this close to hit you and then next thing I know, Shishida was next to me in Recovery Girl's nurse office." Kaibara exclaimed.

"W-well, it's a martial technique called Mikiri Counter. It allows me to counter any thrust attack if I time it right. Sorry for knocking you out by the way." Aki nervously explained.

"It's all good. Kinda cool actually." Kaibra waved it off with a smile.


Author's note: I don't know how to continue so that is it for this chapter XD.