multiple couple yaoi

hi!!! ive been looking for a yaoi and i cannot find it! It was a yaoi and the seme had to move into an apartment because of work reasons (i think??) Well, he met the landlord, who also lived in the same building. After his first night, he ate dinner with all the residents and determined that he didn't care for the landlord. Eventually, they went on a date at an aquarium and after some ups and downs they became a couple. All in all, there were two other guys, who had their separate story, and two woman. The second couple also lived in the apartment and they knew each other since high school. The seme was very affectionate, while the uke was aloof at first, but soon got around to expressing his affections. They too eventually became a couple. If anyone knows please help. This probably isnt the best description but i hope it'll jog someones memory. Thanks in advance