To discover his identity, the young man, alongside Yasuho, sneaked into Kira's apartment, their only clue. But, what awaited them was a Stand attack from the "man upstairs" who has not shown his appearance! Who is this man...!?
The "lion" part of JoJolion's title is a suffix that, to the best of my understanding, can mean "blessed one," "gospel," or "commemorative seal." It's an archaic suffix, and I think it stems from ancient Greece. I combined it with JoJo in order to signify the existence of Josuke, the protagonist, in this world. There's a tragic king in Greek mythology named Pygmalion, as well as a Japanese anime named Evangelion, but I'm not sure if there's any connection there.