PKPD-289 Half middle, half outside, half girlfriend Noa Nana Aoi Noa

I don't need a girlfriend, but I want to have lovey-dovey sex. I want to go on a romantic date, but I don't want to be tied down. It is difficult to find such a convenient relationship. Noa and I communicate on LINE every day and check on each other to see if they're cheating on each other. But he hasn't said he wants to go out with him, and he's actually hooked up with other girls too. However, I like her so much that I don't want her to cheat on me, and when we meet, we have sex. Is this a sex friend? she?