If you've reached the "Solar Ending" then yes, that's the one that'll lead directly into the next chapter once released! The other endings are what you'd call "bad ends" such as the "Distrust" end you get by failing to answer correctly at a certain point in the game.
There's no full nudity, I'll say that outright.
The way the game handles it's erotic content leans more on the "ecchi" type, if you're familiar with that kind of anime/content, rather than downright pornography.
Even going forward, my goal with this game is to write erotic scenes, not explicit sexual ones.