Flash Marriage: The Heiress's Sickly, Possessive Husband Spoils Her Rotten

[Yandere + marriage first, love later + doting on his wife + contract marriage + male lead plays the fool to catch his prey]

A wealthy heir from another planet and a yandere heroine, whose boyfriend of seven years had betrayed her, ended up getting married by sheer coincidence.

She lacked a sense of security, so he gave her one.

She was possessive, so he indulged every bit of her possessiveness.

She was incredibly clingy, but he was even clingier than she was.

She was deeply ill, and he was her panacea.