In short - I loved it. I don't think there will be a second season although it would be nice if there is since I feel like the plot could have been developed more. I learned some things about mineralogy and gemstones thanks to Richard and overall don't regret watching this anime. Seigi and Tanimoto are cinnamon rolls and deserve it all. I don't know if I ship them or if I ship Seigi x Richard. Both ships have a future in my opinion. The opening and the ending songs are perfect. The melody is so peaceful and relaxing For the first time in awhileI didn't skip them once.