Eat the Firebird

Is this a strange phenomenon or an incident?

A diary of the dead is delivered to Kuki Yuuji, who lives in Shinshu. It is a memento of Kuki Sadaichi, Yuuji's great-uncle who died in battle at the end of the Pacific War, and it contains a strange obsession with life. From that day on, mysterious events begin to occur around Yuji, such as the destruction of his gravestone and the disappearance of his grandfather. Yuuji and his wife Yuriko decide to turn to Hokuto Souichirou, an expert on paranormal phenomena, for help, but...

(Source: Monthly Comic Flapper, translated)