The Villain Always Wishes to Tear Apart the CP

Gu Yitian woke up with a start to find that his soul had actually transferred into a homeless man, while his original president's body was occupied by some unknown person. To make matters worse, his lover Song Kuei also suffered an accident and lost his memory, and naturally no longer remembers him. He has lost his identity, his residence, and his lover. How is Gu Yitian going to reclaim everything that originally belonged to him? (Source: Manman Manhua, translated)