Mikasa Momoshima, also known as Bat Pink, is entrusted with the crucial mission of transporting the Crystal Stone, an artifact capable of amplifying energy one hundredfold. As part of a decoy strategy in which Red and the others carry a fake, Mikasa alone is tasked with carrying the real stone. However, her actions are discovered by the enemy, and she is ambushed and captured by Deskros's monsters, Death Eleki and Death Power. Just before being seized, Mikasa hides the Crystal Stone, but despite being brutally tortured and interrogated, she refuses to reveal its location. Will she withstand the enemy's relentless assault, or will she eventually reach her breaking point? In the end, a tragic BAD END unfolds.