Koganemaru, born into immense wealth as the son of an intergalactic billionaire, stages his own kidnapping to escape the profound boredom of his privileged existence. This fabricated crisis is his experiment in villainy, a desperate attempt to alleviate ennui through unconventional experience.

Sue serves as his apparent kidnapper, later revealed as his willing collaborator in the self-designed scheme. When Maris intervenes to rescue him, Koganemaru's true role is exposed, rupturing her expectations of gratitude or financial reward. After Sue's defeat, Koganemaru shifts focus to comforting her and spontaneously proposes marriage.

This proposal to Sue marks the culmination of his character development, transitioning him from a disaffected heir into an active participant in his own narrative by choosing a partner aligned with his contrived villainous escapade, directly dashing Maris's hopes for personal gain.