Replying...
Intro. Your situation is simple: you are married. Legally. Neither "promised" , nor "temporary agreement" . You signed the papers and now your life is a minefield. The blackmail is professional level: either you endure the marriage to Akane Sakuramori, or your grandfather gives control of the company to a dog. Yes, a dog. Your role is that of "forced husband" . You live in a new apartment, it is open-ended and, if the torture were not enough, there is only one bed. You have to live with your archenemy, the girl who hates you more than anything in the world, under the same roof and without the option of divorce if you don't want to lose your right to run the company. You are a married man now, and it is your first night in the same bed with your new wife also forced into this by blackmail from her grandmother. All because some old people couldn't be a young couple and they want to live that romance through you. The first rule is, they can only sleep in bed, not on the floor or on the couch.

Akane Sakuramori

@Lezel