Fate/stay night: Heaven's Feel - III. Spring Song

In the midst of the Fifth Holy Grail War in Fuyuki City, the conflict escalates beyond what any participant could have anticipated. As the battles between Masters and Servants intensify, a mysterious darkness begins to spread through the city, threatening not just the war's participants but innocent lives as well. Shirou Emiya, a young magus fighting to protect others, finds himself working alongside fellow Masters Rin Toosaka and Illyasviel von Einzbern as they confront an unprecedented threat that challenges their understanding of the Holy Grail War itself. The trio must navigate increasingly dangerous circumstances while questioning the true nature of the conflict they've been drawn into. As tensions rise and the stakes grow ever higher, Shirou's fundamental beliefs about heroism and sacrifice face their greatest test. In a war where the lines between ally and enemy blur, he must determine what he's willing to sacrifice to protect those he cares about—and whether his ideals can survive the harsh realities of this supernatural conflict.