It was Chiharu's birthday. After work ran late, I couldn't pick up the cake I had ordered, so I returned home empty-handed after midnight. But Chiharu said, "Just having the thought is enough, thank you," with kind words. I felt a small happiness despite being busy. The next day, I finished my work early, bought a cake, and headed home earlier than usual, excited to surprise her with a belated birthday celebration. When I got home, I found my wife having sex with a stranger.