When leveling up there is a system of the leveling cycle.
Every time you level up you get to spend 10 pts on your stats.
Lvl 1-300 exp-200 ryo
Lvl 2-500 exp-400 ryo
Lvl 3-700 exp-600 ryo
Lvl 4-900 exp-200 ryo
Lvl 5-1100 exp-400 ryo
Lvl 6-1300 exp-600 ryo
Lvl 7-1500 exp-800 ryo
Lvl 8-1700 exp-10,000 ryo
Lvl 9-1900 exp-12,000 ryo
Lvl 10-2100 exp-14,000 ryo
Lvl 11-2300 exp-16,000 ryo
Lvl 12-2500 exp-18,000 ryo
Lvl 13-2700 exp-20,000 ryo
Lvl 14-2900 exp-22,000 ryo
Lvl 15-3100 exp-24,000 ryo
You get it now it goes up 200 each time. Once you achieve level 100 you gets this secret rank making you go even higher to stuff like level 500 or 10,000 O.o