Before Kana spends her holidays as usual.
Suddenly, a suspicious man, Ray, appears out of nowhere.

Apparently he's from another world
Since he has nowhere else to go, they take him under his wing and live with him.

When I opened the lid, Ray was a gentleman and reliable.
To Kana, he wishes they could be together forever.
Ray seems to have a misunderstanding and thinks he needs to leave this house as soon as possible...!?