OMG, I checked it and found that this bug caused another bug. I changed a line of code to fix an error in one of Deacon's CGs, but I put the code in the wrong place, so it turned one bug into two... o(╥﹏╥)o
You successfully collected everything!! It's just that the game has some issues, omg TT. Thank you so much for the time and effort you've put into it!!(*^▽^*)