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The heroine met the female partner at the school gate and became good friends with her. After living together for a while, they met the male protagonist and started a threesome from then on. When the three of them were drinking together, the male protagonist got drunk and confessed his love to the female protagonist, which was heard by the female protagonist who was hiding and smoking. From then on, the female protagonist and the female protagonist parted ways, and the male protagonist went abroad for further study. Many years later, the male protagonist met the female protagonist in a coffee shop and confessed his love to her again.