Encyclopedia Entry:
A variant of unicorn that has an alluring black coat and two horns. When a unicorn has sex with a non-virgin or her husband cheats on her, the man carries that woman’s demonic energy along her husband’s spirit energy when he pours it into her. Due to this, the demonic energy of the unicorn which had been kept pure becomes mixed with another woman’s demonic energy and gets corrupted, changing into the demonic energy of a bicorn, which in turn ends up changing the unicorn into a “bicorn.” They have the same gentle disposition and graceful behavior as the unicorns, however, their true nature is exceedingly lascivious, and these monsters are regarded as “the symbol of impurity,” celebrating a lustful, hedonistic existence.