エンドレスラブ

An ordinary office girl becomes the temporary lover of a rich scion.

I put down my teacup and look quizzically at him. He’s staring at me, the very picture of seriousness. “I know this is really sudden and selfish of me. But will you be my girlfriend for a year, without any prospect of matrimony?” “… Huh?” Did I just hear what I thought I did? Did he just ask me to be his girlfriend with no strings attached?