Zuikou Shouwa

Main character is 25 years old, and works as a security protector in a private security company for the third year. He travels to Hong Kong as a guard of a VIP, but his client runs away from the hotel room, so first day is spent visiting tourist spots. But on the night hotel room is attacked by professional killers. Who is the target of assassination? Something is wrong here, but gears are only starting to move from here.

[From vndbreview]