This event doesn't have any playable sections. However, it will provide several bonuses to prepare for the upcoming Fate/Apocrypha Event in the JP version.
During this period, these Servants from Fate/Apocrypha (and Servants in the prototype version which were scrapped) will receive the following bonuses, as long as they're applicable:
Gain double Friend Points when picked as a Friend Support Servant
Gain double chances for Super/Great Success when earning EXP
Consume only 1/2 AP when doing Interlude or Strengthening Quests