Crazy Diamond Is Unbreakable (story arc)

Crazy Diamond Is Unbreakable (クレイジー・は砕けない), also known as Crazy D (Diamond) Is Unbreakable, is the twenty-eighth and final story arc in Diamond is Unbreakable.

It narrates the climactic battle between Josuke Higashikata and Yoshikage Kira.

Summary
Kira proves to be a difficult adversary, as he combines Stray Cat's aerokinesis with Killer Queen's explosive charges to produce invisible air bombs. After defeating Okuyasu, Kira charges Okuyasu's body to explode on contact, forcing Josuke into a dilemma over whether to take a chance at healing Okuyasu or to pummel Kira. Hayato, however, jumps in the way and sets off Okuyasu's bomb himself, after which Josuke pieces the two back together with Crazy Diamond and resumes his fight with Kira. Josuke deprives Kira of his means to attack them accurately by faking a radio call to Kira, who directs an air bomb to incinerate Yoshihiro's photograph. Without the accurate means to incinerate Josuke any further, and with Josuke's blood still on his shirt, Kira is defeated when glass shards stained with Josuke's blood strike him via Crazy Diamond's restoration abilities.

Kira, unwilling to accept defeat, is pummeled out into the neighborhood sidewalk. Kira seemingly escapes by using Bites the Dust once more. However, he finds himself in the Ghost Girl's Alley, where Reimi forces him to remember his death: after being foiled by Koichi and Jotaro, he was subsequently run over by an ambulance. Recalling the advice his father gave him, Kira attempts to exact revenge on Reimi by forcing her to turn around. However, Arnold rips off Kira's hand with his jaws, causing him to fall from the impact and consequently look behind himself. A multitude of disembodied hands swarm Kira, breaking him apart as they drag him into the afterlife.

Back in Morioh, the town's citizens gather together to say goodbye to Reimi and Arnold as they ascend to Heaven. Meanwhile, Hayato waits with his mother for his father's return, knowing he can never come back. Narrating once more, Koichi wonders whether the wounds Kira left on Morioh will heal, or whether they will prove fatal to the town's future.

As Joseph and Jotaro depart Morioh on a yacht, Joseph reassures his grandson that the youths of Morioh have a golden heart and a sense of unwavering justice that will ensure the town's safety for generations to come. Josuke arrives at the dock to say goodbye to Jotaro and his father (while stealing the latter's wallet). As Joseph fumes, Josuke says goodbye to the duo while striking a pose. Thus, the summer of 1999 comes to a close; for most, it was a summer just like any other.

Chapters

 * 163 (428). 
 * 164 (429). 
 * 165 (430). 
 * 166 (431). 
 * 167 (432). 
 * 168 (433). 
 * 169 (434). 
 * 170 (435). 
 * 171 (436). 
 * 172 (437). 
 * 173 (438). 
 * 174 (439). 

Volumes

 * 18 (46). 
 * 19 (47). 

Anime Episodes

 * 37 (111). 
 * 38 (112). 
 * 39 (113).