All teenage girls go through sudden changes with their body. Rin was a late bloomer, but the change in her body were rather drastic: she grew a penis.
Having two sets of working genitals, her libido has doubled and she’s having trouble keeping her composure during her everyday life. In this state, she meets her long-lost friend, Miruki, who’s had the same double equipment since birth.

Now, finally reunited and delighted to have found a kindred spirit, two girls decide to give in and cement their friendship. With some mutual dicking. Big dicking.

(Source: Fakku!)