Kite and Hiro are a gay middle-aged couple with a daughter named Shizu, born with the help of a lesbian best friend Erika. The two men have taken great care in raising Shizu, but are shocked to find out she has a boyfriend and is pregnant, and struggle to keep their own relationship together while grappling with their new reality.

Toyama, a former teacher, and his student Aoi have been secretly dating since their school days. Now that she has graduated, she has a strong desire to marry Toyama. In front of Toyama, she can be bold and willing to do anything for him. She tries to inspire Toyama with her immature techniques, but...