System, Can I Really Rely on You?

Wen Yun is an ordinary girl. Huo Feng is a boy who has a secret crush on her. But before Huo Feng can confess, Wen Yun dies. So Huo Feng creates a space where he can stay by her side and deceive her. They complete missions together, and then he pretends to bring her back to life. Wen Yun will live in that space forever, while Huo Feng has already secured his rightful place by her side. The story may get a little angsty at first (they complete all kinds of missions), but it gets sweet later.