Fate/Strange Fake 3 by Minako Narita

In the third installment of this thrilling series, the chaotic Holy Grail War in Snowfield intensifies as new alliances are forged and old rivalries reignite. The enigmatic and unpredictable nature of the False Holy Grail War continues to unravel, drawing in a diverse cast of Masters and Servants, each with their own hidden agendas and desires. As the battle for supremacy escalates, the lines between friend and foe blur, leading to unexpected betrayals and shocking revelations. With the stakes higher than ever, the participants must navigate a web of deceit and ambition, all while grappling with the mysterious forces that threaten to upend the very fabric of their reality.