Mutsumi, who my brother brought home when he got married, was a calm and gentle-looking woman. I fell in love with her at first sight. For over a decade since then, I have been secretly in love with my brother's wife, Mutsumi. A turning point came for me a few months ago. Due to work, I ended up staying with my brother. My brother's children had already left home, and my brother and his wife welcomed me. When I arrived home after the night shift, I heard Mutsumi's troubled breathing. Yes, she was comforting herself alone. I panicked after seeing Mutsumi's embarrassing state, so I said I was sorry and ran to my room. After that, Mutsumi came to my room looking embarrassed. I interrupted Mutsumi who was about to open her mouth and confessed that I had liked her for a long time, as if to express my feelings to her. After a long silence, Mutsumi took my hand and nodded. We embraced each other as if it was natural, kissed, and made love.