Comics and promo pics from Rocket Monkey's twitter. The comics were posted a couple months after Girigiri Idol 1 was released, but within the story they seem to take in a time period shortly after Girigiri Idol 3.

Pages 1-11 and a couple of the Comiket ads had better quality pixiv versions, but otherwise these are all directly from Twitter.
https://twitter.com/rocketmonkey_K2/
https://www.pixiv.net/member.php?id=1229532

p01-15 Giri Giri Idol: 15 Secrets
p16-21 Orgasm Potency Level
p22-26 The Secret AV

p27-39 Comiket, Junai Trickster, Giri Giri Idol (2&3) promo pics

p40 Giri Giri Idol (Ayane) cameo in Primal tankoubon
p41-45 Giri Giri Idol Summary - Melonbooks ('Twin Melon' Bundle: Primal & Giri Giri Idol Summary)
p46-47 Giri Giri Idol Summary - Toranoana

这画风无语了

Base +3, greatkong +6, Niteism -6, 伸手党求吃饭 -6, lolo7890 -9, cchaosdear -6, xcz1998 -6, air2004 -6, 526 -17

您能畫嗎

Base +4, zengHQ +5, greatkong +6, cchaosdear +6, xcz1998 +6

Also, in the Giri Giri Idol 3 comments, there was a quick pro-bono translation done by Danicco that covers first 26 pages of this gallery.- and conveniently most of the passages are already numbered.
I did some formating and a bit of proofreading/rephrasing (if I messed anything up or made it worse lemme know):

(/g/936354/8cb242664f/)

----------------------------------------------------------------
[Text bubbles not included here are all moans and sound effects]
----------------------------------------------------------------

Posted on 24 May 2016, 06:06 UTC by: Danicco
@dedalus_six
I was actually looking for that after reading he did that on twitter but I couldn't find... also I don't think it warrants a new gallery or a change to an existing one, so here goes:
From here, in the order (right to left) shown:

==============================================================================

Girigiri Idol 15 Secrets

------------------------------------------------------------ p02

Girigiri Idol 15 Secrets

------------------------------------------------------------ p03

Profile
Name: Kanbe Ayane
Birthday: September 5th (Virgo)
Sizes: 152cm B90 W65 H92
Weight: Secret~
Objective: Become a top idol like her mother and make everyone smile.

------------------------------------------------------------ p04

- Secret Info #1
At school she's constantly in the top 10! A genius!

- Secret Info #2
Currently on a diet to get -6cm off her waist!

- Secret Info #3
She worries about how fat her legs and butt are!

------------------------------------------------------------ p05

- Secret Info #4
It seems she's going out with her producer!

------------------------------------------------------------ p06

- Secret Info #5
It seems during the IV filming was when she became sex friends with the director!
Director... you can't... cum inside today...

- Secret Info #6
Ayane-chan is an idol so she won't allow cumming inside!

------------------------------------------------------------ p07

(Next day in the morning...)

------------------------------------------------------------ p08

- Secret Info #7, A kiss with the producer
After being photographed on their date, they're on guard and rarely get a chance to kiss. But, when there's no one around they go into hiding and do it!

------------------------------------------------------------ p09

- Secret Info #8, A kiss with the director(sex friend)
She goes into a hotel, is forcibly pulled off someplace with no one around and kisses him passionately!
Director ♥ Director ♥

- Secret Info #9
And just like that it seems she'll start fucking him too!

------------------------------------------------------------ p10

- Secret Info #10
On her day off, she has sex while kissing the entire day!

------------------------------------------------------------ p11

- Secret Info #11
Ayane-chan's pose of choice is one that a policewoman her father respects once did!
C'mon, do your usual pose

- Secret Info #12
It seems that whenever she's meeting with the director(sex friend) she wears naughty underwear or swimsuits!

------------------------------------------------------------ p12

- Secret Info #13
Ayane-chan loves director(sex friend)'s big dick!
Director... so big... I love it!

- Secret Info #14
It seems Ayane-chan only lets the director(sex friend) creampie her!

- Secret Info #15
She has now had sex with the director(sex friend) twice as many times as she has with the producer (lover)!

------------------------------------------------------------ p13

- Secret Info #16
It seems like she has trained her asshole for the director(sex friend)!

------------------------------------------------------------ p14

- Secret info #17
As a result of her anal training, she can easily cum from it!

------------------------------------------------------------ p15

- Secret Info #18
And then, it seems her anal virginity was taken by the director(sex friend)!

------------------------------------------------------------ p16

- Secret Info #19
From then on, her asshole became the director(sex friend)'s personal fuck-hole!

==============================================================================

Orgasm Potency Level Drawings

------------------------------------------------------------ p16

Woman Model: Kanbe Ayane
Man Model: Technician Old Man

Aahh~ I'm happy that I can do something like this to Ayane-chan ♥

Level 1: Feeling shy and trying to not let out any moans.

------------------------------------------------------------ p17

Ayane-chan, was it good?
Y-yes ♥
It was good ♥ Thank you very much for today ♥

Level 2: After cumming several times, she starts to let out a sweet voice.

------------------------------------------------------------ p18

Are you still continuing his (this)...
E-ehm... I already came several himes (times)...
Please stohh (stop)...

Level 3: Little by little, she starts speaking funny.

------------------------------------------------------------ p19

Level 4: Her breathing increases and her speech becomes rough.

Crap! Crap! I can't...
I'm going to cum... I'm cumming-

------------------------------------------------------------ p20

Ah- Oho! Ooh~
The cumming... hon't (won't) stop...

Level 5: She lets out a howl and becomes unable to think straight.

------------------------------------------------------------ p21

Level 6: Finally, when she starts feeling less pleasure from anal, she won't care about being creampie'd anymore.

==============================================================================

The Secret AV

------------------------------------------------------------ p22

The Ka〇be Aya〇e's real look-alike big boobs amateur secret AV.
*Due to certain circumstances, the audio of this clip has been edited from the original.

This is A-chan, an amateur with big boobs just like that top idol, Ka〇be Aya〇e.

So big...

She was reluctant to do an AV at first, but after our director's frantic persuasion she accepted!

She's a high school student with a boyfriend...

...and a lewd girl who goes crazy for cheating sex!

Geez~ You're kissing me again... I'm an ====!

[Translation Note: sorry I can't figure all the tiny kanjis from that little side note, the image quality doesn't help... so it's more of a guess]

------------------------------------------------------------ p23

What are you saying after all this?
You've even fucked in front of the camera before...

That was... director's... hm!

If the ======== sees this he'll hate me~

I'll cut this later so...

Okay, you promised!

------------------------------------------------------------ p24

So you don't have to hold back, cum!

It's deep...

It's deep... inside me!

Here, I'm cumming directly into your womb!

Inside...

Cum inside me!

------------------------------------------------------------ p25

I got =====-chan's first creampie!

------------------------------------------------------------ p26

Fucked in the pussy five times, in the ass three times. Also promised to become sex friends-

After the end of filming, a commemorative photo is taken of her striking Kan〇e Aya〇e's usual pose.

==============================================================================

Last edited on 21 November 2018, 23:12 UTC.

Base +7, Fills +6, pesc +8, Zhsoul +7, Charger9527 +6, Paff444 +14, Ch3n9 +6, Ooe Kintarou +14, SethHuber +6, MegaChilcott +9, sayake +18

搞笑吧！画风我觉得很好啊，楼上是没看到老师其他作品吧，觉得无语还哪来这么多话

Base +6