ED Ouji, Hajimete no.

"Help me get an erection! I'll pay you as much as you want." Locked inside a mansion in a desert country, Akira has to put up with Salim's kinky sexual activities day after day. Salim puts a weird device on Akira's you-know-what, forces him to ejaculate while riding an elephant, sets an octopus on him... But he never tries to have sex with him, because he can't get an erection... Days of pleasure trap this Japanese businessman, who only came to the desert country for work...!

(Source: Renta!)