The story should remain a mystery I guess. Maybe you could write down a summary of what's happening? But the surprise of discovering it bit by bit is imo very important in the gaming experience
.
For affection pics I don't know... I'd say yes because if you don't, then your wiki will be too dull and white
. But not affection scenes, that also should remain mysterious so that players enjoy the discovery
.
But imo your wiki should be mainly about Battle mechanics, equipments, characters stats... we hope our system is deep enough for you guys to brain and write pages about it