Ep. 878: Ran, Sonoko, and Sera try on swimsuits while Sashihara Ritsuko is found dead at Simusa.

Ran, Sonoko, and Sera visit a department store to select swimsuits for a pool trip. Sera intentionally picks a suit she wore ten years ago, hoping to trigger Conan’s memory of their past encounter. Although Conan recalls fragments, he cannot pinpoint where he previously met her. Meanwhile, at Simusa, Sashihara Ritsuko is discovered deceased in the changing room. She leaves a cryptic dying message using lipstick on her right thumb, while her left thumb and index finger remain extended. The incident occurs as the group prepares for their outing, linking the personal mystery of Sera’s identity with the sudden murder investigation.

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