Tensei Ero Cheat na Jashin-sama

Note: This manga is based on a web novel.
The novel has two manga adaptations by two different authors and the content is different.
This version is done by Yuuyuu (ゆうゆー).
This version is not licensed in English.
Only the version done by Kuropagu Yuuko (くろぱぐユーコ) is available in English.
Click here for the other version.

I open my eyes one day and find myself lying on a huge bed in a room I've never seen before. "What am I doing here!?" Just as I think that, a bunch of handsome demons show up, as if they stepped straight out of a fantasy!!! "...I want you to kiss me, and be at ease," says the mighty, manly Demon King. "Please... Hurry, I want it...!" says the attractive middle-aged prime minister. "Ah!! No! If you touch both those places at once... Aahn!!" says the hot young instructor. Time to say goodbye to my boring former existence, and become... the strongest and sexiest evil god!? The story of a wide-eyed, ordinary businessman's reincarnation into a parallel universe with a hot, demonic, homoerotic reverse harem begins!!