The official YouTube channel for Japanese pop-rock band SEKAI NO OWARI released a collaboration music video for their 21st single "Stella," which is featured as the opening theme for the summer 2026 TV anime Jaadugar: A Witch in Mongolia . SEKAI NO OWARI "Stella" x Jaadugar: A Witch in Mongolia Collaboration Music Video Jaadugar: A Witch in Mongolia Creditless Opening Video "Stella" was composed by Nakajin, the guitarist of SEKAI NO OWARI, with lyrics written by vocalist Fukase. The CD single is scheduled to release in Japan on July 8. Tomato Soup, the author of the Jaadugar: A Witch in Mongolia manga, shared the following comment about "Stella" on the anime's official website : When I listened to the completed song, I felt that it was written with deep empathy for the protagonists of the story. An endless battle in a world they were suddenly thrown into, repeatedly questioning who they ought to be—much like searching for one's own coordinates while reading the stars. I believe that this song, by portraying that as a source of strength, will certainly become a hope for someone else again.