Twelve years into marriage, with just one child, our family life seemed ordinary. Next door lives a seemingly harmless, unremarkable young otaku-type man. My wife has always been gentle, caring, and deeply empathetic. But before I knew it, she caught the attention of our neighbor, and gradually began to notice him more and more. Exploiting her kindness, the young man slowly drew her focus night after night, until she completely fell for him. In the end, he carved himself so deeply into her heart that there was no turning back. Here is a warm yet heartbreaking story, unfolding like a narrative, of how it all happened.