repost: please help me!

I'm looking for this yaoi manga where the seme lived right under the uke and his twin brother. The uke's twin brother had a lover who kept mixing the twins up. Because of that, he kept coming on to the uke instead and the uke always hit him and made a huge racket, resulting in the seme going up to the uke's apartment room to complain. The seme learns about the uke's situation and offers to let the uke stay in his house while his brother's lover is there. The twin brother also has his own story, too, I believe. It turns out he was in love with his twin brother all along, but didn't make a move because he thought his brother was straight. He later ends up with a colleague from work. I asked this same exact question a looooonnngggg time ago but I forgot the title yet again. Big thanks to whoever can help me out!