He Lost Everything, Then He Married A King Manga

Colin, adopted son of the Bishop family, was drugged and framed by his adoptive brother Kyle and fiancée Jenna. He woke up in Empire Group CEO Aman's bed, and lost everything. Jenna called off the wedding, Kyle stole his shares, and his foster father threw him out. Colin signed a contract marriage with Aman for revenge. They took down the enemies, and between the schemes and the battles, Colin fell hard. Then he discovered his foster mother murdered his birth mother and Aman's father helped her. Together, they sent both to prison. In the end, Colin and Aman exchanged vows in the cathedral, not as a deal, but as a promise.