Just a continuation from last time.

Isaku got into stance as Claude charged at him. He uses his smoke bombs once again to close the distance faster. Claude tries a leg sweep, while Isaku tried a flying kick. Both miss each other completely and quickly recover. Isaku tries to throw his kusarigama but Claude grabs it pulls him over. Isaku barely dodged a punch from Claude, before using his double dodge to exit Claude's range. Chitoge shouted from the sidelines.

"Claude's an expert marksman and martial artist, be careful!"

"As if I didn't know that already..." Isaku muttered, before shouting. "Go after Raku and Tsugumi, I got this."

Chitoge hesitantly tried to leave, but could not do it, as she was still curious on what Isaku was capable of. Isaku sighed, before his senses caused him to duck again. He then elbowed Claude in the stomach before being kneed in the face and knocked further. Both fighters were a bit dizzy from their injuries. Claude staggered a bit from the blow to his abdomen. Isaku then took this chance to run into the school, before saluting Claude and saying.

"Like I said, I have more important things to do."

Claude growled as he ran after him, with Isaku following the sounds of Raku's and Tsugumi's argument and banter. But Claude quickly catches up and the fight continues in the hallway. Claude tries to draw his gun and shoot Isaku, but Isaku takes out a kunai and throws it at Claude's hand, disabling his trigger finger and dropping his gun. Claude drew his knife once again and tried to close the distance between him and Isaku. Isaku then spun his kusarigama again and threw at a random object, pulling it and throwing at Claude, who dodged it and still kept going.

"Face me you coward!"

"I got better things to do than defeat you a second time!" Isaku said before speeding up, using his super sprint to outrun Claude.

Isaku then went up and saw the window, looking out to see that Raku had jumped out with Tsugumi. He knew that he still had to defeat Claude, otherwise he would never reach Raku in time. He then left the window open, and waited inside one of the rooms. He sat in the shadows as Claude then looked out the window. Claude then cursed out loud, saying.

"That cowardly bodyguard ran out on me! And it looks like that bastard Raku has cheated by jumping out the window and knocking out Seishiro!" Claude said with clenched fist. "Oh, I'm going to teach that boy a lesson! And without that meddlesome bodyguard, I should get off scot-free!"

"Think again."

Claude turned around to see Isaku fly out of the shadows and kick him, sending him out the window. Isaku then jumps after him as they began to wrestle in mid-air. Isaku spun his kusarigama and grabbed Claude, and kicked him as they plunged into the bushes. Though there was a little rustling in the bushes, Isaku emerges, mostly unharmed, but bearing cuts and bruises from the fall. He sees the door in the boys locker room close as he assumed that Raku and Tsugumi probably went inside to dress up. Looking at himself, he thought that he should clean up as well. He enters the locker room, to only see Raku, and Tsugumi with his unbuttoned shirt. Isaku then squinted his eyes before realizing that Tsugumi wasn't a boy after all. His femininity was actually a clue to his TRUE gender. Tsugumi was very flustered to find herself undressed. Isaku then hears the voices of approaching people and hissed to Raku and Tsugumi.

"Both of you get dressed! They're coming!"

Raku and Tsugumi quickly went hastily to dress up as Isaku closed the door as soon as Chitoge approached him.

"Is someone in there?" Chitoge asked.

"None that I know of." Isaku replied calmly. "Besides, I think they've gone home already."

"But someone shouted that someone jumped from the third floor!"

"Er well, that was me..." Isaku said while walking to the bushes. "I was still in the middle of my fight and we took it here."

Chitoge then glanced up and down at Isaku, seeing him wounded and bruised, with his face bruised and bleeding from Claude's blows.

"Yeah, you don't look so good. You gonna be okay?"

"I've had worse." Isaku remarked dryly. "This is child's play in comparison."

"Yeah... Sorry about Claude."

"It's all good, he manages to amuse me with his fighting ability, so I appreciate it for now."

"You know... Except for the fighting, you seem like a mature person."

"It's valued with my line of work, so I knew when to grow up." Isaku replied, before turning to see the girls run to Chitoge.

"We didn't find anyone in the Girls' locker!"

"Why did you want us to search their anyway?" The second girl asked.

"Huh? Well, Tsugumi's a girl!" Chitoge replied calmly.

This prompted a huge wave of reaction among the girls amusing Isaku to no end.

"EH!?"

Isaku then took this chance to check back on the Boys Locker room. But much to his shock, he sees Raku and Tsugumi still barely fitting their clothes. He hissed at both of them and said.

"What the hell is taking you two so long!?" Isaku hissed, before turning to check on the outside. "I'm trying my best to distract Chitoge here!"

"W-We were just having a conver–"

"Well shut the hell up and put on your clothes!" Isaku commanded, before turning to see Chitoge approach him. "Okay, scratch that, hide!"

"W-Where should we–"

Isaku threw his kusarigama at Raku and Tsugumi, grabbing them both and pulling them over, before stuffing them into one of the lockers. He then leaned on the locker, and took off his shirt, as Chitoge entered.

"Oh Kirisaki-san!" Isaku said as he was taking off his shirt. "Why are you here?"

"I thought that it was weird for you to come back here, so I thought that I'd check." Chitoge replied.

"Nope, just me!" Isaku said while taking off his shirt and flapping it. "Just changing clothes!"

But there was no more attention on him, as the girls were staring at his body. As a Shinobi, he was lean, but strong. He could lift over a hundred kilograms over his shoulder, so there was some muscle. His body was very scarred, but it did not seem to mar the work of art that were his muscles. Even Chitoge could not resist a peek.

"Anyway, if you don't mind, I'll be changing now so please leave the–"

A faint thud made Isaku jolt, sending chills up his spine. Whatever the fuck Raku was doing in there, he certainly wasn't helping. Isaku cursed to himself as he saw Chitoge try and open the locker.

"Kirisaki-san, I don't think you shou–"

Chitoge had opened the locker door, to see Raku and Tsugumi stuck inside. Isaku then saw the aghast look on Chitoge's face, and closed his eyes while silently praying for Raku.

The rest of the conflict was resolved after that, and Isaku lay witness to Chitoge's herculean strength, which was impressive, even by his standards. He then decided to leave, as his work here was done. He walked back to Claude's resting place, to see that his body was gone. He would be back to cause some more mischief, but Isaku will always be there to oppose him. He then sat down and took out a First Aid kit from one of his compartments, he takes out a bandage and begins to clean his wounds. He made short work of his cuts, and covered them all with relative ease. But there was one that was a little too deep for him to simply bandage. He takes out a medical needle and began stitching his wounds, each pierce causing him to grunt a little in pain. But the moment passes and he is back to full strength. He then decided to sit and lie down, resting a bit. A figure approached him and said.

"Stand up."

Isaku followed the command and bolted up, seeing Tsugumi right in front of him, though this time, she was wearing a ribbon and a female school uniform. It was a bit strange to see, but Isaku managed to stop himself from staring at Tsugumi's outfit. Tsugumi herself looked absolutely serious as she faced Isaku once again.

"So, what did you require of me, Miss Tsugumi?"

"I want to know what you are, Mister Isaku." Tsugumi replied curtly. "I have never seen that level of skill with someone your age."

"Well Miss Tsugumi, I can assure you that I'm human." Isaku quipped, before adding. "But I'm merely dedicated to my line of work as an assassin."

"Then how come I've never heard of you in the industry?" Tsugumi asked skeptically, folding her arms.

"Because you assassins are so insistent with the flashiness and light shows, that you never at least tried to be subtle." Isaku said bluntly. "I specialize in making everything look like an accident. Because a good assassin knows when to cover his tracks."

"Fair enough. But that doesn't explain how you could outmatch me and Claude in combat."

"Hmmm... Maybe I'm just more dedicated in combat?" Isaku shrugged.

"Don't you dare compare your dedication to mine. All the training I've done was for Ojou."

"Sure, sure." Isaku said nonchalantly.

"Look, you may not see things the way I do. But you're dangerous. And Claude and I don't like new players in this field, especially with Ojou's safety as our primary concern."

"Well that's your problem. I am merely just sticking out for Raku. If you pull anything against him or his relationship, I won't hesitate to use deadly force." Isaku said with a venom-laden tone.

"But what do you really think?" Tsugumi asked.

"It's none of my business, and if you hold any love for Chitoge, you'd know that it isn't yours either."

"How dare you–"

"And I'll make sure to keep it as their business." Isaku said while drawing a bunch of kunai and brandishing them. "So even a chance of meddling or petty squabble, and you and your friend Claude get it."

"Hmph, fine. I see how it is." Tsugumi said while walking away. "I always will fight for Ojou, so if it comes down to that, prepare to face me!"

"I'll be curious to see what a pretty face can do." Isaku remarked amusingly.

Tsugumi suddenly stopped in her tracks, before turning around and screaming.

"I'M NOT PRETTY!"

Tsugumi then turned tail and ran off, leaving Isaku quite confused.

"Kids these days, such emotional, hormone machines."

Yee, this crossover is still pretty weird.