Something to look into would be "Guilt of impurities ~ Sin of immortality" by "Kishin Yui" (or Pouty Keiki). It is a fan theme of Junko's target of revenge, Chang'er. The song is similar and contrasting to to "Pure Furies ~ Whereabouts of the Heart"
The performance is really moving! Thank you very much for playing one of my favorite Touhou OSTs. By the way, your video is really popular in China, as we have a lot of Touhou fans here. It has 24 thousand views now on bilibili, the Chinese RU-vid.
Hello, I've been browsing your channel for the past 30 minutes, and I have to say I am amazed to see a seasoned violinist skilfully play video game music! That being said, I would highly recommend you check out a game series called Ori; the music is moving and breathtaking, the story is simple yet emotionally charged, and the art is grand and gorgeous. It would be an honour to see you interpret its music. Merci beaucoup!