Sanae (I thought it was Sana before?) really does have a crush on Arata, huh. Don't tell me she's like planning something waiting in the wings to catch him after Shinju is executed. Shinju already found out her identity though, yikes.
Manga's going full steam ahead on the nudity this chapter. IMO that nude two-shot of them on page 19 looked more suitable to turn into a sculpture rather than a painting.