Based on the Idom@ster SideM app. 315 Production – a newly set up small talent agency – has assembled a group of aspiring male idols from various occupational fields. They include a former lawyer, a former doctor, former pilot and so on… Even though everyone hails from different background, they share a common dream: to be the top idol. And so, the stories of these male idols at 315 Production take centre stage… Includes episode 0 prologue, Episode of Jupiter.