一度だけでも、後悔してます。(Ichido dake demo, kōkai shitemasu.)

Plot

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....But what is Koduka Chiyo, a heterosexual twenty four year old woman supposed to do?

Vía: Baka Updates