Oya ga Urusai node Kouhai (♀) to Gisou Kekkon Shitemita.

Machi Morimoto is a girl who is expected to settle down, get married, and become a stay-at-home mother. Her parents nag her about finding a suitor but she is neither interested in nor understands love. In an attempt to stop her parents from controlling her life any more than they do, she marries her best friend, Hana Agaya, who lost her job and needed a place to crash. Hana is into girls, and she has had a crush on Machi since high school. While Hana is charismatic, outgoing, and always doing what she loves, Machi has never experienced the tender feeling of love or being loved. Only time will tell if their fake marriage will allow true love to flourish or end up driving them apart. [Written by MAL Rewrite] Included one-shot: Musanso Renai (Anaerobic Love)