Probality Up Campaign (確率アップキャンペーン Kakuritsu appu kyanpēn) is an event was held to commemorate 2015 Silver Week. Event was held in September 28th, 2015 (10:59)
Event
During this event, probability for more rare gacha drops is increased. There is no known date when the event will end though nor will the event last permanently since perhaps this event is about the new adjusted gacha drops ratio.
Gallery
Event Poster
Reference
Template:SpecialEvents List