It is trust me, it's a long gruesome haul. I'm at Lv. 98 right now (THANK GOD) and it's going to be another 40 times doing Mission 93 to level up one last time.
For everyone's information: you need 1,000,000 EXP to get to Lv. 100.
Wtf thats pretty stupid if you ask me. That doesnt even sound like a challenge, just repetative, boring, and time consuming. Why would they even make it like that, thats not even fun..... It took me about 40 hours or so to get to lvl 99 on Re: com for Riku