Oh god I really like this gam but got so frustrated when I keep stabbing the president because I didn't get a good ending. After experimenting and reading th comments, I have to say I officially completed the Souma route.
At first I wasn't interested in getting back together with my ex because , ya' know , who would want to get back with someone who hurt you.Despite that, after playing the Souma route, I can say that I really liked it. Might replay someday with the Izumi route.
Also I don't know why I feel this sene of accomplishment when I stabbed the president (Q.Q)