Don't Call It Mystery (Omnibus) Vol. 9-10

The story revolves around Totonou, who is determined to distinguish between the mischievous Hatomura twins, only to uncover a perilous family secret. As he learns to tell them apart, he grapples with the potential dangers of revealing the truth. The plot thickens when Detective Aoto's daughter is kidnapped, prompting a reluctant partnership between Totonou and the detective. Their investigation links the current crime to a notorious cold case, challenging Totonou to help clear Aoto's tarnished reputation while unraveling the mystery.