@Hitsudora Not quiet, the one you are missing is Yuki the Yuki-onna event in that abandoned house northeast in the snow town.
There will be an event when you enter the first time after you complete the first set of town events. Then the second time you enter it, you will encounter her. Note, if you fail you grab her collectible or fail this encounter, you won't have a second chance.
Another one you are missing near the end is collecting enough collectibles using steal and talking to the helper in the 'lab' where they collect them.
Apparently, even I am missing two, where one is likely Anna's, the other one I have no idea.
Gallery wise, just go interact with the big monitor for 're-battle, cg, and defeat events'
@megaman17 The plugin is a H type. Please remove all items that increases other type parameters.
Easiest way to do things is just do 5 neutral plugins, then 1 of the type you need. Can figure out if it requires activating the pendant with just 3 tries at maximum. (If it doesn't require pendant, you got some quest (running around) to complete.