Ai da Koi da no Kiku Mae ni

Sudou, the apartment manager, possesses a strange ability: anyone who hears his voice is immediately charmed by him. However, things take an unexpected turn when Inose, a charismatic host from a local club, moves into Sudou's building. For the first time ever, Sudou’s voice seems to have no effect on someone...

(Source: Shinshokan, translated)

Note: Chapter count includes an extra.