Kyou kara, Hitozumansion ni Nyuukyo shimasu.

In this apartment complex, all the residents are married women whose husbands are away on business—except for one. Sachiya, an office worker with an unusually high libido, finds himself as the only man in the entire building. Surrounded by lonely wives, he quickly becomes the center of their growing frustration... and desire.

(Source: Kodansha, translated)