Jinsei wa Kekka All Right!

A 16-year-old high school student, Sei, comes from a family with a history of mysterious disappearances, including both of his parents and two older brothers. His father was a UFO researcher who once told him, "Someday, a UFO will come for you." One day, Sei finds a new door in his closet that leads to an unfamiliar apartment in a future Tokyo, about six years ahead of his own time. The apartment's resident, Oribe Hiroshi, appears unfazed by Sei's sudden arrival and treats him as if the situation is normal. Stranded without personal belongings, Sei considers whether to trust this stranger and how to deal with his unexpected predicament.