All Digital Editions of the Manga Have Been Delisted as of 2019

(from ebookjapan):
The Time Patrol was established in the late 22nd century, at the same time as the invention of the time machine, and is an organization that controls crimes related to time travel. On the morning of the first day of his long-awaited vacation, he is forcibly summoned to the patrol, where his new partner, patrol member X, is waiting for him. In addition to the title story, the collection also includes the short works "Doctor SF" and "Cave Boy Saran".