Momo was born with a secret, a secret that she has to hide from everyone to be able to fit into society. Until one day, a virus that mysteriously broke out made it harder for Momo to keep it hidden any longer. Should Momo reveal the secret herself or should she keep it hidden at all costs?
So the lesson is that if their roles were reversed, their relationship would have been sealed by chapter... [*looks it up*]... 14. Don't know how I feel about that.