The Lonely Egotist(2004)

Sabishigariya no Egoist

Minami has gotten a hot start as a young interior designer. In fact, he's just been chosen as the primary designer of a new luxury hotel. When Minami enthusiastically goes out to meet his client, Asakura, the hotel owner turns out to be a dazzling, sexy man. On top of that, the overwhelmed Minami finds his contract is actually for a love hotel! Seeing as how Minami lacks experience in this particular area, Asakura promises to show him the ropes. But is it really necessary to try out ALL the beds...?!

(Source: DMP)