When Kim Taehyung's fictional romance with his costar Jeon Jeongguk starts to feel more genuine than anything he accomplished in his entire acting career, he believes it shouldn't be a problem: after all, it's just acting. But isn't it wrong to be envisioning someone else by his side when he already has a movie star girlfriend... who also happens to be Jeongguk's sister? EXTENDED SUMMARY INSIDE [ a taekook fanfiction. ]