In this story, the main character is a famous actor named Ken. He comes from a show called "Theater Starless" which is an underground stage.

Every night, Ken performs a show where he performs a variety of different songs. There are also other performers, such as the female singer Mitsui, who also performs at the same event.

When Ken is not performing at the show, he is usually relaxing at the bar or dining with his friends. But one night, a mysterious girl named Rin shows up at the bar and asks to join him. It turns out that Rin is actually an actress named Rin Okami, and she is performing at the same show as Mitsui.

After talking with her, Ken decides to help Rin out with a difficult role and she asks him to accompany her to the backstage area.

Rin asks Ken to join her and they both enter the backstage area.