Searching for title of a specific manga

Im looking for a manga where two lovers have been together for three years and have been living together for a year yet havent had sex as the uke is worried that the seme will not be able to get it up as he is a man. The seme also attempts to force himself on the uke when he sees the uke at a bookstore talking to a woman who turns out to be a new half,the uke was consulting as he was considering changing his gender to be with the seme.