Takumi, Ranko, Fumika and Shizuku are all energetic trainees
who dream to become famous idols. Their training days are
flavored with the occasional romantic encounters with their producer.

Then... the protagonist suddenly dies and is reborn as a dog!?

"I am the God Dog. I grant you the power of hypnotism. Using this power
you shall make your favorite idols into your own cumdump tramps!"

Receiving the message from the god, his b*stiality ambition gets fired up!

[From DLsite]