What the Heart Craves (2007)

In the process of performing a magic trick at a bar with some acquaintances, Kurata accidentally swaps keys owned by Mukai and his ex-g.f. Shitara, infuriating Mukai's current g.f., Kozue. Attempts to return the keys to their rightful owners are frustrated by petty jealousies and suspicious minds, leading to an emotional labyrinth of resentments and rivalries.