Sono Tensai-sama wa Gisou Kanojo ni Shuuchaku Suru

"From today, we're also in a relationship." After discovering her boyfriend's infidelity and being harassed at work.. After a variety of troubles, Hoshino Rin finds herself on the brink of collapse, without a boyfriend or a job, just before turning 30. After much deliberation, she starts looking for a husband, but her plans are ruined when a mysterious, insensitive man bursts in. Then, one day, at her brother's request, Rin does some housekeeping for a "talented programmer who returned from overseas." She agrees, thinking it'll be fine as he's her brother's friend, but the person who shows up on the day is..!? A doting love story that begins with a contractual relationship between a solitary genius programmer and a caring, unfortunate woman begins!.