Libereco
These stories draw their inspiration and match the themes from the main story of this universe 'Libereco'. You should read that to get a feel for the backdrop of the others. The primary inhabitants of this universe are futanari hybrids that have a separate orifice for urination independent from their penises and lack external vaginas. As with Libereco, there is some near future medical science contained within and events happen in a current event exclusionary bubble.