If anyone is still reading; I have the same problem. After playing the game for about an hour I reach the point where the Anbu Captain offers a 'Mental Training' mission to level up the main character one single level, but I have run out of missions and it is simply impossible to level up the character enough until the next day(not enough exp missions left). Do I simply have to wait until the next day to level up and continue, or am I missing something? It really takes the fun out of the game