After Ranjiko starts attending school, Xin's vacant time finally opens, he can now go out and do whatever he wants without thinking of someone waiting for him at home.
Because of Young Yoruichi's presence, Rangiku easily adapts to the academy life, but to his surprise she did not choose to be a Military with Yoruichi.
She actually chose to be a normal student with everyone that Xin of course gladly accepts, it much better for her to be a normal student than going to a much higher rank position.
After getting more free time, worry-free life, Xin starts to conduct his own investigation about Hogyoku.
Based on his observation, the Hougyoku's presence is not one but thousands of them, just from the presence of it.
He don't know what the Hogyoku is doing this past year but the scope of his search is not huge, the presence only appears around the Rukongai.
The first clue he got is the missing Souls around that mysteriously disappear at the same time without any witness.
And the group of people who lurk around the Rukongai in these past years, seem to look like a group of Shinigami based on what he heard.
And lastly is the huge gathering of spiritual energy every time the Hougyoku's presence disappears.
"So what information do you gather?" He asks.
"Nothing, it's like those missing Shinigami mysteriously disappear in tin air after they arrive in the destination they are going to."
"Mysteriously disappear?"
"That's right, they disappear after they arrive at their destination, based on the clue and finding of my team, they only disappear after they arrive at a different location."
"Any other clue?"
"Our next clue is that they all got a special mission on the day they disaster, no one know what the mission is but from the serious face of each victim, it seems the content is pretty important."
"So important that they even fail to ask for the permission of their Captain before going into that Mission."
"What about the Letter of Mission? Did you trace where they come from?"
"That's one of the mystery that we want to solve, base on our findings, there's no mission given by the headquarters without the Captain Commander's Signature, and mission for hundred Shinigami is pretty impossible to give, after all, there's no need to dispatch hundred of them even in case there's a war or rebellion."
"You are right, a mission can easily be tracked if they pass in the office of the Captain Commander, but what confuses me is, what those Shinigami did not even ask or talk to anyone after getting the mission?"
Young Yoruichi though too, why those missing Shinigami don't even talk to anyone or even friends or family about the mission they get.
"Maybe the mission is too important and creative that's why they did not tell it to anyone?"
"You forgot something."
"?"
"Did you notice, all of the missing Shinigami are just rank Cadets and some low-level rank? Not even a higher rank is involved in this case."
"Your right, they are all new and low-rank Shinigami."
"Just think about this, an important mission will be given to a new Shinigami, do you think that Shinigami did not think about his or her rank after getting the mission?"
"And the most important is, from those hundreds of Shinigami, I think there are a couple of them who are smart enough to think about the problem, right?"
Young Yoruichi nodded, ``If there's a bunch of Idiot Shinigami from those missing people, there should be a couple of smart one involved too."
"What do you think is the reason?"
"The first reason I think is that the Mission comes from Captain Commander or Captain and the letter tells them to keep quiet and secretive about the content of the mission."
"That's true."
"Second is that the letter contains vital information about something that will cause a huge mess if someone discovers it."
Young Yoruichi nodded again.
"Third is Greed."
"Greed?"
"Maybe the letter contains a simple promotion after completing the quest, but i think this is not the right answer because i can't imagine hundreds of greedy Shinigami at all."
"Your right."
"And lastly is the Mission contains a very specific thing that no one ever wants to be discovered."
"Like what?"
"Zanpakuto? Advance Reiatsu Training Guide? Unlimited Power? Or Even overflowing Treasure? Well, nothing is impossible right?"
Young Yoruichi nodded, with those things given, everyone can be blind with their own greed and personal goal.
"But I'm still confused about what they did to those Shinigami?"
"What do you think is the best asset of a Shinigami?" Lou mysteriously asks, right now, he discovers a pretty crucial clue about the case, and remembers a pretty hidden danger that is being planned right now.
"Their body?"
"No?"
"Maybe their money?"
"Yoru wrong?"
"Then what?"
"Simple, our own Spiritual Energy, did you forget what our body made and our best asset?"
Young Yoruichi's face amazed from her discovery," You mean those Missing Shinigami are collected for their own Spiritual Energy?
Xin only stands up and walks inside his house, Yoruichi snaps out and hurriedly asks," Hey we are still not finished? Why leave me alone?"
"That's your job, stop bothering me, and go home and do your homework."
"You spoiler! Giving me a hint and making my appetite heighten then leaving me hanging up!"