Mikasa squirmed and moaned as the second boy spilled his seed inside her too.  She collapsed, panting, dangling from her wrists as she recovered.  After a few moments, she felt a warmth spreading through her, and felt her magic power begin to grow inside her again.  With a gasp, she realized what had happened; as long as she had a guy cum inside her, her magic would return.  She didn't feel quite at full power yet; apparently she needed more than just a few guys, but this was enough.  At least, it would be if she could get out of this cage.  "H-hey!  Are you guys going to let me go now?  I'm not supposed to be one of your slaves!" she complained, yanking on the chains for emphasis, her breasts constantly smacking the elf girl in the face.