Fate/stay night: Unlimited Blade Works 2nd Season

Synopsis

As Shinji's Servant tears out Illyasviel's heart from her corpse, Shirou and Rin confront him and Shinji himself. When Rin threatens to kill Shinji, the two are forced to leave, but not before Shinji reveals his Servant's name as Gilgamesh. While burying Illyasviel, Rin confronts Shirou about his ideals and tells him that he needs to prioritize himself over others, otherwise he will break. He denies this and tells her about the time Kiritsugu rescued him, which caused him to admire him. However, Rin tells him that it is still wrong to value the lives of others over his own, citing that someone who was spared from a terrible tragedy has to live out their life to the fullest and that wishing for the happiness of others is no different from a machine. Despite her argument, Shirou remains committed to his ideals. Later on, as they evaluate Gilgamesh's power and conclude that Caster is still their priority, the two are approached by Lancer, who offers his assistance, which they accept. Meanwhile, Archer learns about Kuzuki's wish to help Caster succeed in her plan to return to her original era using the Holy Grail. Archer later confronts Shirou, Rin, and Lancer as they arrive at the church. Lancer engages Archer to give Shirou and Rin time to breach the church. As they do so, Rin informs Shirou that only one jewel (the same one he previously returned to her) exists in the world, and that Archer had already returned such a jewel to her. (Source: Wikipedia)