At the end of Akiha's path through Arcade Mode, she demands her brother back, and Aoko says that she doesn't dislike spirited girls. She then makes a remark like "You can call me Neesan", and something I didn't understand. Then Akiha replies, saying that she has no intention of allowing a person like Aoko to become her senpai. My question is this: any idea what Aoko would have offered/was offering to teach Akiha, and why she offered to become a senpai? Or is it just another twist on how they look alike when Akiha goes vermillion (this is in normal Akiha path, by the way). What do we think?