The sweet love between the world's number one killer and a simple and cheerful female college student. From meeting and getting to know each other to falling in love and accompanying each other, Yuanyuan's insistence on love and her gentle comfort to him moved and influenced Senlei, allowing this man who had been living with darkness for almost half his life to feel the warmth of the sun. Once you endure the cold, you will appreciate the value of sunshine even more. After marriage, Yuanyuan often said: In the beginning, I was lucky that I wasn't scared away by your bad temper, otherwise such a good husband would have been someone else's! And what always responded to her was Sen Lei's rare smile of relief, like a rainbow after the rain...