Koinaka

Kouta is the sole heir to the Mikomori shrine in the rural, declining town of Tsumagoi-chou. Disinterested in the shrine, he focused on his studies to become a civil servant. His widowed father spoke of marrying a young woman named Erina, then vanished. Erina subsequently moved into the shrine with her younger sister, Motoka. With assistance from his childhood friend Mio and some shrine supporters, they maintained a normal life. Later, Erina brought home a girl named Mai, who claimed to be Kouta's fiancée. Events eventually escalated to Erina demanding that Kouta impregnate her.