Synopsis: Mikakunin de Shinkoukei

Yonomi Kobeni, an ordinary girl, receives the unexpected revelation that she is betrothed to Mitsumine Hakuya, a boy of her age, who has moved from the countryside to live with her. Accompanied by his younger elementary school-going sister, Hakuya comes to reside with Kobeni and her elder sister, who's already living with her. The manga explores their identities as a "pair" and "sisters-in-law" whilst depicting the lives of these four individuals as a family.