Tsuki wa Kirisaku: Tantei Sagara Kyouichirou

You play as a detective called Kyouichirou Sagara and must work to solve a number of cases. The game makes use of the "Parallel Character System" which allows you to view crimes from the perspective of multiple characters. Once you've cleared the first scenario, you gain the ability to select between scenarios two, three and four. Based on how you progress through the story, the ending will change.