This volume was a lot better than volume 3, and covers the England arc. It still has its issues, and a small number of bad typos, but all in all the story is a lot more fun, possibly largely because Seigi is ill for a lot of it and his struggles and Richard caring for him are very fun. It's also very sweet how much he and Richard explain how much they love each other. And Seigi's self-sacrificing nature is just so sad and sweet.

I appreciated Richard trying to address Seigi's low self-esteem as made manifest by his need to be useful to the people he cares about. Seigi's mental health is a fun topic to explore, and I look forward to see where it goes, particularly with what I've seen in the anime.

I can't say I recommend this to anyone who doesn't already like the anime, or who doesn't already like the light novel series. It's still not particularly well-written, at least in English, but if you're committed to Seigi/Richard and enjoy learning a lot of stuff about gemstones, this is the book for you. ( )