This show is not good. I'll start there. However, it is hilarious. If you watch it like you're watching a badly scripted SNL skit, it's AWESOME.

The plot is Nine and Mill are debuting together in a group with the concept of "business gay performance," which is essentially fanservice. Naturally, the two of them realize that they have feelings for each other as well. The pacing of the show is totally off, the script is bad, and the acting is worse. It's basically them acting out poorly-written fanfiction. It's never as queer as you want it to be, and instead you're left laughing at the absurdity of the show. I enjoyed watching every episode of this and laughed real hard at it. Don't go in with high expectations. It's probably only worth watching if you're a fan of onlyoneof, in which case the plot seems very fitting considering the group's concept.