Ai janai Nara Kore wa Nani

What is the reason that Ruri Akabane, the leader of a popular idol group, jumped down from the room of one of her fans? For Ruri, who was once a dull underground idol, the turning point for her life was a message from one of her scarce fans, "Merusuke." From then on, she gradually became more and more obsessed with "Merusuke."