Images are from Rocket Monkey's twitter, unless a better version was reuploaded on pixiv.
https://twitter.com/rocketmonkey_K2/
https://www.pixiv.net/member.php?id=1229532

p01-12 Primal promotional Pics
p13-36 Miscelaneous Twitter pics/pinups.
(Though these were posted at around the same time as the Primal stuff, there's no indication whether these drawing are also of girls from Primal or other existing characters. Some might be, some definitely aren't)
p37-49 Primal Tankoubon Exclusives (Ads/Samples): Melonbooks, Comiczin, Toranoana, Twin Melon (Melonbooks)

p45-46 Is Ayane from Giri Giri Idol
p48 Seems to a be Hatsukoi Delusion character? https://e-hentai.org/s/e0be983ba6/634019-73

You know, I consider Egg or Chicken to be the gold standard of Oyakodon story arcs. Mainly because the girls are thicc and the artstyle is superb, not to mention fitting for the job. What makes a good Oyakodon story is the jealousy dynamic between mother and daughter that leads them to compete with each other over the affections the guy in question. Whereas the daughter touts her youth and supposed vaginal tightness as a superior charm point, the mother has a head start in sexual experience and the mature aura to back it up. Even if her tender milf pussy is not as tight as it used to be, it wouldn't matter as much because said experience has improved the mother's technique to the point a higher threshhold of guys tend to pick her over the daughter in a scenario where the guy has to choose whose pussy he prefers. Such as in the case of Mizuryu Kei's very first story involving Mitsuko Souma and her daughter Kurumi. What that has to do with Rocket Monkey's three chapter trilogy (if we're being generous enough to call it that), I don't know. All I know is that I reeeeaaaaally like Egg or Chicken as a hentai story and wish there were more like it. But mostly I would like to see the Primal Tankoubon get translated one day, even if there was only a few or so new pages worth of content for the Egg or Chicken story. This concludes my mostly autistic lecture on why I love Oyakodon as a pornographic Chinese cartoon genre, so there you have it.

P.S. In case any of you were wondering, I consider Mizuryu Kei's Souma family stories a close second when it comes to Oyakodon. The same can be said for Kiliu's Kumao family stories being a close third to me as well. But really, all three of them are good and equal fapping material in my eyes, depending on what I'm in the mood for at the time.

Base +6, HabaneroJim +13

CoolStoryBob

Base +7