Yona Yona Bokura wa Machiawase

Kou Nishito, a graduate student with insomnia, and Yoiko Ichijo, who struggles to sleep due to loneliness after living independently, are identified as having a highly compatible sleep gene known as "Nemunoki." They decide to live together as part of an experiment to improve their sleep. Despite initial hesitation, they try sleeping in the same bed and experience a deep, restful sleep they haven't had in years. The story explores the quiet, unusual connection between the two as they navigate this shared experience.