FSDSS-463 "I'm Getting Married..." My Childhood Friend In The Opposite Room Is Secretly Sleeping With Her Fiance Just Before Marriage And Falls Into Muddy SEX Natsu Igarashi

"This person is my fiancée..." Natsu, my childhood friend who I've liked since school days, came back to my parents' house with my fiancée one day. The Childhood Friend Who Peeked Through The Window Every Day During School Days Will Soon Belonging To Others...I Can't Stand The Naked Body I See Through The Window, So I Approach Natsu And Cross The Line...The Quagmire Of Sex That Can't Be Said To My Fiancé The days have started...