時間跳躍式完全無劣化転送装置

A rising star who caused a stir at Comitia, presents his first short manga collection: SF x Friendship—a two-time winner of the Comitia participant vote and a huge hit on social media, Yamamoto's first short story collection! Includes exclusive new illustrations only available in this book. A collection of short stories that color subtle friendships with science fiction. Includes four short stories, including exclusive new illustrations and stories that have been talked about in various places. (Source: Shogakukan Creative, translated)