I watched the anime before reading this and I wanted to continue with the series. This volume appears to be the end of that adaptation. It covers the end of the Claw of the Sea arc, its aftermath, and the events that follow, such as Mitsuhide getting hypnotized, and the palace exhibition.
What appears to link them is the contrast in Shirayuki and Zen's relationship. While they grow closer together romantically, the social distance is still an issue. Shirayuki is a court herbalist and official "Friend to the Crown" and this brings her tantalizingly close to Zen, but he is still royalty. There is some drama about that, and it is handled sweetly.
Overall, this is a chill volume. Perhaps something of a breather after the high stakes in the previous arc.
The art is beautiful, as usual with this series.
Trickster Eric Novels gives "Snow White with the Red Hair volume 7" B+
His fantasy series, Journey to Chaos, is currently available on Amazon as an ebook or paperback.