Konohana 4 ~Yami o Harau Inori~

Meguru Momoi and Miako Tachibana are back in their fourth murder-mystery adventure, along with Shinobu Sakurada. As they were taking a shinkansen (a bullet train) on their way to an excursion trip to Kyoto, they heard a scream only to stumble upon a murder scene.

[from MobyGames]