decent story i buy the entire bundle this when on sale but played/read ACE Academy years ago when i pirate'd so another reason other reason was to support the developers it great characters if i'm going to rank characters romance and non romance route best ending with a reason and then ranked by {character development personal interpretation.}

Valerie despite her playful personalty she values those who keeping her promises although i did not like ending as a hole i give it a pass the reason i blame her mother breaking so many promises given the fact felt more not to say along the lines of destroy your fathers legacy but more forced in a neutral way you have a choice department but will support you regardless of your choice on a side note i believe mc father and Valerie father are connected reason hot chick exchange student comes goes straight to mc caught in the eagle doubt she was a spy other wise she never would have revealed the code she found not once spoken about her father like she avoided it i think if memory serve me right she also would not an assassin would not wait a year to eliminate the target.

Shou
as for Shou is like a bro although is he emphasised not to be burdened by the past must likely due to Shou relation to his brother would not surprise me if his after story may leads to mc dating Mei Satomi.

Kaori
now as for Kaori when the mc meet her or the first time i did not like Kaori until the near the end of the story she under stands the mc desire to ether protect or destroy mc fathers legacy willing to go lend support if its important enough to mc to find answers given her personality in the story her qout if it important to you make time for it.

Mayu a is shy girl I liked her till that one scene that made her a psycho level stalker that came to mind after seeing the CG unlock able very indecisive until later on her upon dating her becoming more open.

Yuuna my least favored character more then Kaori the reason being honestly if their was foul play at work then their letting Nikki know would be by first priority if their was concrete evidence and now another reason why i rank Yuuna dead last was her view on mental health for piolets if it was a military school then OK but its not. suspecting Valerie father was some how connected there is more then enough evidence points Yuuna's brother being in the cross fire one year prior which also be reasoning Yuuna view on mental health so important to Yuuna not being capable seeing her brother death coming despite being able to sense others inner thoughts

rank for character flow of development
Kaori
Valerie
Mayu
Shou
Yuuna