The official YouTube channel for voice actor Yui Ogura (Tomarin in Teekyu , Priestess in GOBLIN SLAYER ) started streaming the music video for her new song, "Q.E.D." The song is featured as the opening theme for the summer 2026 TV anime A Livid Lady's Guide to Getting Even: How I Crushed My Homeland with My Mighty Grimoires , in which, she is also cast as one of the main characters, Lunoa Carlton. Yui Ogura "Q.E.D." Music Video A Livid Lady's Guide to Getting Even: How I Crushed My Homeland with My Mighty Grimoires Creditless Opening Video Yui Ogura debuted as a solo artist under King Records in July 2012 while also active in the voice acting units YuiKaori and StylipS, both of which have since gone on hiatus. She moved to the label Nippon Columbia in August 2022, and the song "Q.E.D." released digitally on July 7 as her seventh single under the label (21st single in her overall solo career), followed by the release of the three-edition CD single including the B-side track "Utakata Mermaid" on July 22.