Dual Identity Cooperation

The world has become complicated and everyone lives from a different perspective. In order to complete the task, he must defeat the company's big boss, and then kill him in one fell swoop. After he lost his memory, he couldn't find the person he was looking for, and everyone's identity was faked from time to time. His friend's sister turned out to be the murderer, and the person behind this incident was unexpectedly the person closest to him. Between love and friendship, he can only choose one. He must choose to kill one of the two...