So Long, My Friend: The last shot echoing from my heart (Part 1)

what happens

Ryo's old friend Robert Harrison arrives in Tokyo for some sightseeing, but with an important job to take care of, Ryo decides to let Robert in on his mission: to protect Princess Angela of the Felidan Kingdom while she attends peace talks at a secret villa to settle a civil war. The two meet with the princess and General Marukido, whom with Ryo already has suspicions. This is confirmed when Ryo is able to take down some assassins and the plot is revealed: to blow up the villa where the peace talks are being held.