Oshikake Oku-sama to, Kimi no Uso

Haruse Chiaki, the owner of the struggling secondhand bookstore Kotatsudou, was on the verge of closing it in despair. In front of him appeared Shinohara Ren, a mysterious beautiful girl. In exchange for helping the used bookstore recover, Ren demands that Chiaki marry him. Pushed by Ren, who says she needs to understand the bonds of family, Chiaki accepts the arranged marriage, though he is initially confused. And so began a slightly strange newlywed life with Ren, who was aiming to be a “perfect family.” Though confused by Ren’s unconventional behavior, Chiaki gradually begins to feel drawn to her. [MTLed from the official website]

Haruse Chiaki, the owner of a struggling used bookstore named "Kotatsu-do," was facing the impending closure of his shop amid despair. Before him appeared a mysterious beautiful girl, Shinohara Ren. Ren offered to help rebuild the bookstore, but in exchange, she demanded that Chiaki "marry" her. Pushed by Ren, who said she needed to understand the bonds of family, Chiaki reluctantly accepted a contract marriage despite his confusion. And so began an unusual newlywed life with Ren, who aimed for a "perfect family." Though bewildered by Ren, who often defied common sense, Chiaki gradually found himself drawn to her.