Futari-gurashi

Yurina is careless with both men and money, and Fumi is dressed in rags and has no hope of becoming a manga artist. These two are polar opposites, but that's why they're able to be together. They're strangely on the same wavelength, and they're only friends. One day, as they continue to live a carefree life together, Yurina finds out she's pregnant... An affair partner, a sex friend, a stalker who she only slept with once... who is the real father? Where is Yurina and Fumi's life headed...? (Source: Kodansha, translated)