Natsuzora Triangle Ntr Rj01312904 Extra Quality Updated -

Alternatively, if the user is referring to something else entirely, like a legitimate product or a different type of triangle (e.g., in mathematics or geometry), but the term "NTR" and the RJ number make me think it's related to doujinshi. Without more context, it's hard to be sure, but the safest assumption is that it's about explicit content.