How Scientists Conquer the Ocean

The male protagonist is a hitman with no emotions. When an assassination mission fails, his teammates are betrayed by their organization along with him, and the entire team is killed. As he lies dying, he thinks back on how he lived in darkness from childhood, spending his whole life in it and never seeing the light before his death. He never even got to say goodbye to the girl he loved. Then, filled with regret, he is suddenly blinded by a dazzling light and takes over the body of an ordinary man from a normal family. A hitman becomes an ordinary person, bringing light, hope, and warmth to a man who had lived in darkness. Having never known the care of parents, he gradually breaks free of his past as the plot unfolds. A hitman raised and trained in darkness from childhood transmigrates to the world of Detective Conan. Will he change the story's course? Will he find hope for life, become entangled in love, and escape danger when all seems lost? When he meets the heroine, he dislikes her at first, but after everything they go through, will he follow his own feelings or avoid affecting the plot? Will he choose to forgive his past self and begin anew? And what about the sudden departure without a goodbye, and the reunion...

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.