Yume no Tsuzuki
Continuation of a Dream
夢のつづき
Ailey, the selfish daughter of a multibillionaire, "buys" her favorite rockstar in an intergalatical society and essentially forbids him from leaving her private planet, no matter how much he trys to leave. But as time goes on, the rockstar Marty, continues to resist, and she must either kill him or let him go. (Source: M-U)