When Vash opens the door and stares down at the wrapped box, Roderich's heart promptly skips a few beat.
When Logan enters the scene, takes the box from Vash's hand, and walks into the house with the Swiss, Roderich's heart promptly starts to hurt.
Against his better judgment, he lurks toward the house until he is near the window. He gazes through the blinds. He fists his hands and gnaws his lips. The cake is meant for Vash and Vash only. Watching Logan work through his hard effort makes his insides twist into knots. If he were a more violent man, he would smash through the glass and demand that the Australian to cease and desist.
But alas, this is Roderich Edelstein. He pulls away from the house just as a loud commotion from within begins.
The evil koala has returned, and Roderich takes it as his cue to leave. Chest aching from an unknown pain, he strolls down the lone road home.