Bug Girl.  

Bug Girl, バグガール。

In rare instances, individuals may experience sudden changes without warning. This phenomenon has been referred to as "Body Unknown Gestalt," or "BUG" for short. Due to the risks posed by those affected by BUG, the government established a special combat unit of genetically modified soldiers called Cheater. Kiko Ayane is a new high school student who feels an overwhelming urge to use the restroom during her entrance ceremony. However, just as she relieves herself, she experiences a sudden change and causes the school to explode! Now, Kiko's life will become even more complex as Cheater hunts her down.