I just have a bad feeling since the first chapter. I'm not the type who likes threesomes, I thought this fic will be only Ereri/Riren. Levi doesn't seem to be someone who would share what's his. This is actually a great fic and I love how write the smut scene! But sorry I don't really like the ending. You should've warned the readers about the threesome in the beginning though.

OH come on you have to write more to this. Its to good to be complete! please please more it was awesome!

Damn, this was very good, I wish there was a second part where we saw the three of them happily together *heart* I loved that in the end Levi liked it enough to make the proposal of them doing it again (and again) :3 your descriptions are really nice. And I really like this couple/threesome, I think there should exist more material of it in the world haha.

Damn, I would have to say that you nailed my headcannon for Levi's and Eren's personalities in a relationship. Everything down to the Levi's fake resistance to Eren's naughty streak was perfect. Nonetheless for me, I don't think Levi would be too willing share Eren all the time, if ever. But I still enjoyed the threesome, as well as your writing. Though, you may want to get someone who has a strong background in English to check your grammar. You do have good grammar skills which will make it hard to anyone to check and catch errors. There were a few in the story. Other than that, well done. Very well done.

My poor cinnamon roll shocked for life

Wow...I really commend your writing skills! Just...amazing!

I seriously need the next chapter now :3

I loved this story! You should make a sequel!

Okay... about your "which name is right" question, I had to whip out my dictionary for this. The japanese kanji used in the manga (調査兵団 rom. Chousa Heidan) have multiple meanings like 3/4 of 7the kanji the Japanese use.

調- exorcise, investigate, key (music), meter, prepare, tone, tune, writing style.
査- investigate.
兵- army, private, soldier, strategy, tactics, troops, warfare.
団- association, group.

Also add on this for size:

Survey/Investigate- Chousa (same kanji)
Reconnaissance- Teisatsu
Scout- Teisatsu
Corps- Heidan (lit. army corps) (same kanji)
Legion- Shinbutai
Regiment- Rentai

Sooooooo "Survey Army Corps", is the literal translation. All of the names have the general idea down and are close enough, but that's what I found... so unless someone wants to call my dictionary a liar, there ya go. If I were you, I would go with Survey Corps, but any of the others are fine, just not the literal translation.

I think I'm going to need new ovaries.

You, my friend, are absolutely fantastic. You have no idea how many times I had to look away blushing and in a fit of giggles. Normally, I have self control to rival Levi... but you really got me going. You should definitely continue this! I find this trio very enticing.

You are truely, the one and only, yaoi goddess.

I have no words on how hot this is and what it does to me. (*.*)

I loved this fic up until the last lemon, Levi and Eren, yes! Levi, Eren and Armin, no!

The correct term would be scouting regiment :)