Shimojou, despite having everything at his fingertips, finds existence mundane and craves excitement. Drifting away from his affluent lifestyle, he embraces the underworld akin to a yakuza. Nonchalantly facing life as a trivial plaything, he encounters Kuze, a despicable figure from his past who once defeated him. Kuze's unexpected reappearance triggers a mix of irritation, nostalgia, and discontent within Shimojou. In a moment of spontaneity, he proposes a bizarre arrangement, suggesting Kuze becomes his pet in exchange for financial support. Thus begins a peculiar bond between an intellectual pseudo-yakuza and a destitute vagrant. As their intertwined lives unfold once more, the unpredictable journey ahead raises questions about their shared future.