Please be aware of two-timing affairs File 1

With Kageyama as her chauffeur, Reiko and her friends visit a crowded summer festival, where a cracked smartphone is discovered. Its owner was poisoned in his apartment, and he died wearing nothing but briefs. Three women the victim dated simultaneously on a matching app fail to match the height of a suspect seen exiting his residence, which leaves Reiko puzzled at the true culprit's identity.

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S01E05 - Please be aware of two-timing affairs File 2 / The person who dropped it is a VTuber File 1