Bekssi's manga / #Memory Loss(2)

An accident causing Takahiro to lose his memory reduces his live-in lover to a roommate. Takahiro believes himself to be straight and is confused by his attraction to his friend. Kotou Tarou is determined to let Takahiro fall in love with him on his own, so he keeps their former relationship status secret. There have a few instances over the years where I've gone looking for this story so I'm finally adding it to a list so I won't lose it again.