I don't need a girlfriend, but I want to have lovey-dovey sex. I want to go on a lovey-dovey date, but I don't want to be tied down. It's hard to find a relationship that's convenient. Natsuki is older than me, and she contacts me as soon as she gets off work. We contact each other almost every day, we tell each other we love each other, and we have sex without a condom, but we haven't explicitly talked about wanting to date. Is this a sex friend? A girlfriend?