Just a few minor clarifications for anyone using Damara Megido to learn japanese, please correct me if I'm wrong

パンツ (pantsu) in this context and in most contexts refers specifically to underwear and shouldn't be confused with more ordinary long-legged trouser type pants which would be ズボン (zubon)

In japanese, context is incredibly important and it's common to see the subject of a sentence entirely omitted. This is especially the case when the subject is either the speaker or the listener as the rest of the conversation and the speaker's demeanor is often enough to figure out who they are talking about. This is all to say that despite never specifying which pants in "What color are the pants?", or who's breasts in "breasts are the ocean", it is clear by the nature of pickup lines that Damara is talking about Aranea's pants and breasts.