Loli with huge breasts, H-cup, Mikoto, CRC-050

Mikoto suffers from an incurable condition that requires her to constantly suck a man's penis, triggering an attack if she doesn't perform oral sex for even an hour. The cause is completely unknown, and there's no cure; the only option is for her to heal naturally. Her only support is her brother. As long as she can suck her brother's penis, she's okay even when she's out and about…