I noticed that... this tankobon was already completely transated!

And the main series even was mostly decensored!
All but the colored pages, the first actual story, and the last three ones had an uncensored version already here!

So, I put together what was already translated. Plus the cover, index and final pages of the japanese tank, since they had no actual story (the final page may have some, but even so just author's comments).
Favoring the decensored version if available, sorry censored fans.

I know compilations are frowned upon here, but... this IS the official tank complete, NOT just me putting all chapters together, so I *think* this should be fine?

The versions I'm using:

Raw: /g/971950/c0cce07bfc/

Colored pages (4 pages): /g/1068216/f4152bd253/
Chapter 1: /g/1533826/a1adf8ec36/
Chapter 2: /g/1065317/e749539d2a/
Chapter 3: /g/1062619/8bedc8dfc5/
Chapter 4: /g/1073057/5f30fd34d0/
Chapter 5: /g/1062746/112ddef936/
Chapter 6: /g/1067669/958a29cc48/
Chapter 7: /g/1067767/0c76db4e57/
Chapter 8: /g/1068177/36d66be618/
Chapter 9: /g/855574/56bd4cc28b/

And yes, there ARE at least two more Imouto no Oppai ga Marudashi Datta Hanashi. But these are the only ones in this tankobon, so they are the only ones I am adding. As I said before, this is not a compilation, just the official tank.

I put the individual covers and credit pages (of the translations with them) at the end.

Inconsistencies in resolutions remain. Only tankoubon raw is x1500. This gallery:
- Chapter 2 is x1200, doujinshi raw.
- Chapter 3 is x1600, doujinshi raw.
- Chapter 5 is x1674, doujinshi raw.
- Final chapter is x2500, magazine raw.

Non-tankoubon raws can also be identified by visibly worse censorship.
This gallery: /s/69d0a008a2/2472419-225
Tankoubon raw: /s/d6175a1a1e/971950-225

Tagged 'compilation'.

The decensoring is flawed too.
Chapter 3 doujinshi raw: /s/a5a164ff34/890633-23
This gallery, some redraw had to be used: /s/dcc88c4388/2472419-80
Which made her genital looks slightly off from how the author actually draws it in the tankoubon: /s/b6a5bc6379/971950-80

Base +7, Daremo Shiranai -7, sgc_geh +11, Flarh -6, WiscoSnap +3, Biladsan +17, rarog +6, steveouniverse -8, Sordh +9, Dnkz +54, -terry- +31, hentai1hunter2 +16, BaperNu +9, and 1 more...

Wow , siblings in Japan have such a close relationship, it just warms your heart doesn't it.

Base +17, fjsdhgft7vg +9, The bonker +6

I always get the feeling that this artist is an alien captured by the government and forced to draw these stories without actually knowing what siblings relationships are.

Base +6, Masthorbaiter +6, Unwrinkled Brain +1

pretty sure the only doujin author that made realistic sibling relationships was Juma Juma Juice.

people who actually have siblings don't tend to write about wanting to have sex with them.

Base +7

I had a version of this from 2017. But it appears that was also not a proper tank collection

Base +10