Fate/stay night: Unlimited Blade Works 2nd Season - sunny day is a special anime that premiered in fall 2015, produced by ufotable.

About the production: the story comes from a visual novel, there is 1 episode of about 10 minutes and its current status is "finished".

Its main genres are action and fantasy, with themes such as Magic and Alternate Universe.

On AniList, Fate/stay night: Unlimited Blade Works 2nd Season - sunny day has an average score of 73%, a good score, and appears on 41,110 users' lists.

As the Fifth Holy Grail War reaches its conclusion, Saber repeats her final duty from the previous war in order to end the vicious cycle once and for all. With the decisive blow draining her remaining mana reserves, Saber's body begins to dissipate. She utters a tearful farewell—but Rin Tohsaka reaches out to her at the last moment. The future has been changed, and a new beginning awaits. (Source: MAL Rewrite, edited) Note: Based on the Good Ending scenario from the second route of TYPE-MOON's visual novel, Fate/stay night.

Official synopsis from AniList.