Diamond Wa Kudakenai. It's the year 1999. It's 1999, that year. Morioh, a quiet and peaceful city that is normally, has recently become a hotbed of strange activity. Now a marine biologist, Joutarou Kuujou is heading to a mysterious town to meet Jousuke Higashikata. Although at first, the two seem, strangers, Jousuke is in fact the illegitimate child of Joutarou 's grandfather, Joseph Joestar.