Aria is a Fangirl who likes the idol group Light U up (L.U.P) especially Lexa who is actually her own lover.

Until one day Aria finds herself pregnant. But instead of being promised responsibility she is met with betrayal, Lexa wishes to kill her.

However it’s just like receiving a miracle all of a sudden when she wakes up in the body of a man named Lee Jaegu, the youngest prospective member in the same group as the lover who betrayed her. This time, Aria wants to repay what Lexa did to her, but... Something is weird with Jaegu’s body!?