My name is Fang Yu, and I'm an ordinary college student.
It all started with a room I rented off campus. My roommate wasn't human, but a little demon who had waited for me through nineteen lifetimes.
Even the old man who rented me the room was no ordinary person. I seem to have stumbled into a massive conspiracy, and the truth is that I have to repay the debts of love left over from those nineteen lifetimes! What happened over those nineteen lifetimes? Why was this little demon willing to wait so long for me? And who exactly is the old landlord?
