Prologue

Humans have been poisoned by a virus which has separated them into two groups: the yin and the yang. Thing is both sides don't understand love and hate each other.
When many years have passed the virus has started to slightly wear off and each side has those who have disobeyed some rule. They are banished and have to survived as banished people. Except they aren't alone, both types are banished in the same spot.
Together the YinYang both have a piece of the other with them. How does that happen? Through sarcasm, scary encounters and maybe, just maybe, love.