I actually remember quite a bit from this novel but I just can't figure out the title. The MC has two or three brothers who all work in the family company. The MC wants to take over the company with this major bidding project that he's in charge of. Transmigration happens and he moves out of the familial home because he realizes his presence forced his eldest brother away. He also gives up on the project and fighting over the company because he has no experience in business, only music. MC moves into an apartment and happens to live across from ML, president of a rival company for the bidding project, who initially thought the MC wanted to get close to him for the bidding price. Eventually, ML falls in love with MC and invites him over everyday to see him under the guise of MC playing the piano to cure his insomnia. MC gave ML the bidding project at the lowest price and ML refuses the project to solve the backlash MC created for his family's company.