"This person is my fiancé..." Natsu, a childhood friend I've liked since school days, one day returned to her parents' home with her fiancé. The childhood friend I used to peek at every day through the window is soon to belong to someone else... Unable to endure the sight of her naked body through the window, I approached Natsu and crossed the line... Days of muddy sex began, something I couldn't tell my fiancé.