FSDSS-463 — "I'm Getting Married..." My Childhood Friend In The Room Opposite Is About To Get Married And I'm Going To Have A Secret Affair With My Fiance And Fall Into A Muddy Sex Session Natsu Igarashi

"This is my fiance..." One day, Natsu, my childhood friend whom I've always had a crush on since high school, comes back to my parents' house with her fiance. The childhood friend I used to peek at through the window every day during high school will soon be someone else's... Unable to resist seeing her naked body through the window, I approach her and cross the line... The days of messy sex that I can't tell my fiance about have begun...