It was hard for Yoo Jun Tae to get over the death of Amara. He still couldn't believe that she was just gone like this and had woken up once or twice from his sleep with the thought of visiting her, only to be reminded that she was gone, forever.
Amara was his only friend after coming into this strange era and now that she was gone, Yoo Jun Tae found out that he was all alone. It was as if he had lost a part of himself - his past. No one would know about his past anymore, not that anyone would believe him even if he told them that he transmigrated.
Right now, the only person connecting him to his past was Queen In Ha and he would do well to get her as his woman and the one he spends the rest of his life with. He couldn't lose her now. And that was why he had invited her to dinner, not only to distract him from his grieving but to remind him why he was even doing this in the first place.