I Married My Female Friend (女ともだちと結婚してみた。, Onna Tomodachi to Kekkon Shitemita) is a Japanese yuri manga written and illustrated by Shio Usui.

Best friends Kurumi and Ruriko made a promise that if they are both single in five years time, they would marry each other.

Written and illustrated by Shio Usui, I Married My Female Friend was serialized in Ichijinsha's Comic Yuri Hime from November 18, 2020, to October 18, 2023.

In her review of volume 2 Friedman noted that “Usui Shio-sensei is best known here for Doughnuts Under a Crescent Moon, which is an unconventional story about a couple finding affection.

The dynamics of the couple are wholly different, but this too is a series that gives us a chance to see a relationship that is not the typical framework of – dating-romance-partnership.