Even If It Was Just Once, I Regret ItIchido Dake Demo, Koukai Shitemasu; Auch wenn's nur einmal war, bereue ich es ...; Even If It Was Just Once, I Regret It; 一度だけでも、後悔してます; I Can't Believe I Slept With You!; 即使只有一次也会后悔
One day, a jobless Koduka Chiyo is wallowing in self-pity and trying to escape from reality when her landlord bangs on her door — she's three months behind on rent.
Her landlord's solution?
"Please have sex with me."
Thus the two begin living together — a romance comedy that seemingly starts with sex.