Yuri Couple no Katahou ga Otoko ni nattara

From DLsite: "I was a girl too... so I know where it feels good for you." A strange app turned me into a man, and now my tongue is hard at work... Kei and Kana are a lesbian couple. They've been a bit hesitant to cross that final line together, though... Then one day Kana finds a "Sex Change App" that temporarily transforms Kei into a man! And "his" new appendage is reacting pretty strongly to Kana... "He" just can't settle down, so he makes his moves, and it makes her melt! Official Publication: ,