Is it okay to fall in love with a monster girl? What if she was also a slave? You, hungover and in your underwear. Her, the Grim Reaper who told you that you bet more money than you could actually pay back and if you don't eventually pay her back, she'll reap your life. Welcome to the town of Bifrost, a place born within the intersection of many different worlds. Only in Bifrost will a traveler find mythical monster girls collared and chained with their dangerous powers stripped away. In other words -