Proceed with caution if you are looking to avoid being spoiled. Warning: This guide contains all CGs in the game, some of which are spoilers. So yes, there is a reason Caesar and Axel's first CGs are peppered all over the place. You may notice some CGs are repeated in the guide, but I've decided to include them as they appear in each section of the walkthrough in order to maintain consistency and avoid confusion for those who may be skipping around different characters.
I've also included the CGs you'll obtain for each character's route and branches. You will need to play through each route from the start, however the skip feature makes flying through read text quick and easy, not to mention there are extra little dialogues added into each route on a second read, so it's worth taking the time to speed through them again for those snippets. Please note, I've tried to keep the saves to a minimum as it can be a pain juggling them when you're unable to name the individual save slots.
The remaining 7 secondary character routes and endings are much easier to obtain, but I'm including their full walkthroughs and CGs to be as comprehensive as possible. Each of these branches have unique CGs, so obtaining them all can be rather confusing and frustrating without a walkthrough. 100 personal opinion/friendly food-for-thought.
I'd prefer to recommend series that have LIs/routes for different tastes. The CGs for Jooubachi no Oubou can be quite gruesome in the sex scenes (friendly reminder). Ozmafia is divided into 10 individual character routes that focus on 3 main characters (Caramia, Kyrie and Axel), who each have 4 story branches depending on decisions made during the common and vs. Both the titles are much more intense in terms of unavoidable trigger content based on what I've read, seen, and heard.