At first, the cells were just going along their way, doing their jobs.

3803 and 1146 were talking to Eosinophil about something while strolling through the stomach when it happened.

They heard a big splash that came from the other side of the glass.

Taking a look, they saw a capsule.

This left the three confused since the body's been rather peaceful for the past few days.

Taking a closer look, something appeared to come out of the capsule and exited through the door.

It took a moment before they considered it being any kind of antigen.

"An antigen may have slipped through with that capsule! After it!" 1146 shouted as he and Eosinophil ran towards the location of the door, with 3803 not far behind.

The entire time though, his receptor never went off.

By the time they got to the area, the three noticed a crowd of cells gathered by the door.

Pushing through the crowd, they quickly realized that it wasn't exactly an antigen.

This 'cell' was wearing a blue surgical mask and cap, with their clothes being a lime-green jumpsuit.

They wore matching blue rubber gloves that extend to their elbows, with their shoes being simple blue boots.

To top it off, they had black headphones with a lime-green visor attached, while also wearing a belt with all kinds of gadgets.

"What kind of cell are they?"

"Could it be a basophil?"

"What about a B cell?"

The stranger began to speak.

"I am Nanobot Model No 0011. This body's participating in a program to see if nanobot technology can aid cells in bodily functions of a healthy body, and eventually aid bodies that are currently unsuitable for blood donation."

They then looked at the three.

Their eyes were rather square-like, with irises but with no pupils in sight.

"Let's see, the data I have suggests that you are an erythrocyte, neutrophil, and eosinophil, correct?"

They slowly gave a nod.

"Listen, my current job is to analyze how this particular body runs. In order to do my best with this job, would you mind if I follow you around, erythrocyte?"

She looked surprised.

"I don't think it would be wise to follow me. I get lost a lot!"

They then revealed a small smile.

"Not to worry. I have a map of this body in my database. I can guide you, while you show me around."

While she was hesitant at first, she agreed.

Eosinophil and 1146 went their separate ways, bidding the other two farewell.

"You can call me 3803 by the way," she told them.

"Oh really? In that case, you can refer to me as 0011."

They were making their deliveries while running into her senpai and kohai.

They were rather skeptical of her new friend, yet they kept quiet as they did when they saw her with the group of neutrophils.

When they were heading to the lungs, 0011 had her stop.

She looked on as they took off something from their back.

"I didn't realize they had a red backpack." she thought.

They pulled out a glass tube and a plug while taking a pair of tweezers from their belt.

"What are you doing?" she asked.

"One of my main tasks is to take samples to analyze the condition of this body. That's why I carry this belt and backpack, they have the tools I need, and more."

Taking a sample of rubble, they put it into the tube and plugged it up, putting it back into the backpack.

"Oh, can I ask something else?"

"What?"

"Do you know anything about this other body? The unsuitable one?"

They thought for a moment.

"My creators sent me into this body, and another nanobot, no 0012, into the unsuitable one. We both gave him that name because he's so unhealthy the body is under code black. If I can do my job here, then 0012 can do their job over there and clean up the blood so it can be donated or sold. I hope this works out because that body from what I heard has a couple top-tier cells in their fields."

They showed her a small touchscreen with pictures.

Her eyes opened wide in shock by what she was seeing.

The vessels were beginning to clog, the liver cells were worn down, and the overall condition looked bad.

They then showed her the picture of the two cells.

What was shown was a red blood cell and a white blood cell.

Something about them did make her heart jump.

Maybe that white blood cell reminded her of 1146? They both had similar bangs.

Maybe it was the red blood cell. The glasses he had did look rather unique.

"I do have their numbers. One is U-1196 and the other is AA-2153."

They put the touchscreen away.

"Wow." was all she was able to say.

"You're lucky to not have to work in their kind of environment yet. Maybe if this works, you might be able to meet them one day. They seem to be the right blood type."

3803 then had a small smile.

"Maybe one day, considering the possibility of another hemorrhage."

While the nanobot wasn't surprised by this, knowing the body's history, they still had a few unanswered questions.

"Speaking of which, this body has a compromised immune system, right?"

She gave a nod.

"One of these days, maybe I'll find out the reason why."

With that, they continued to the lungs.

Unkown to them, another capsule was on its way, and with it comes a surprise.