I Married My Female Friend Vol. 1 (manga)

Kurumi and Ruriko made a deal: if they were both single in five years, they would marry each other. Five years later, neither woman is attached, so it’s time for a wedding! Marriage is full of firsts, especially for two friends, so they have a lot to learn about each other in their newly shared home. But will they continue this arrangement like two especially close roommates…or will a different kind of love bloom between them?