IDK which two you are talking about? The last two scenes? The last two characters? In any case, you can find a full game guide in the description. That should help you out.
I was talking the other 2 on the row with esix (mew and idk the other ones name)
edit: I'm still unaware on how to get them in gallery even after reading the description
2nd edit: nevermind I figured it out
can you help me unlock yuumi