ロイ・マスタングの飽くなき戦い

One sunny day, Roy is going to work at East Headquarters. Since Lieutenant Hawkeye is off today, he can relax. Or so he thought, but as he stepped into the office, he saw countless papers scattered about on the floor. And some important documents that need to be submitted soon are missing! Were they stolen, or...? Can I get the documents back, find the culprit, and submit the papers before the deadline? [Translated from official story page]