I'm a married person, Natsu is the one about to get married. This business trip unfortunately encountered heavy rain, Natsu immediately invited me to go to the hotel to shelter from the rain. There was no other way so I had to stay. But Natsu continued to seduce me, making me irresistible. And since then, every time it rains on a business trip, my sister and I seek shelter from the rain and indulge in sex. Gradually, my feelings for her grew more and more, I wanted to be with her more, I just hoped it would rain when the two of us went on a business trip. But it seems it's just because I'm in love. You don't want me to be serious about this. Some time later Natsu got married, and our relationship ended there...