did you miss the part where it says this game "refrains from explicit sexual content"?
Actually I did miss the part, after witnessing an explicit sexual content with Luna I didn't have any reason to believe it would refrain from such content. If it isn't then it shouldn't tag it as nsfw if it's not going to be nsfw. And what's the point of pursuing multiple girls as romance option if it isn't going to show nsfw, could have gone the close friends route. I did say the story is good though.