DUEL BOY is a quick card duel that arrives in packs of seven cards, a divider, and a pocket sticker you can use to call out opponents. The game debuted at the 2022 Tokyo Game Market and was designed for people in line, on public transport, or anywhere without a table. You stand up, grab your pack, shuffle, and the game begins. Each player receives seven cards and a cost marker. The quirky rule: you can only play cards from the right side of your hand, while paying the cost with cards from the left side. This forces you to think in sequences and use your hand as a path you must follow. When a player wins a hand, they swap two cards with the opponent. At the end, whoever wins three hands or forces the opponent to have no card on the first turn of a hand wins the game. You get one chance to reshuffle after the initial shuffle; after that, the hand stays fixed. Once per hand, you can put the discard pile at the bottom of the deck in the exact order you discarded, which can turn the game around. The ideal game length is about 10 minutes, perfect for people with limited time. The game works for 2 players, but the dynamic stays the same in any configuration. Hand‑management requires constant attention, as each card can be both a threat and a hindrance depending on when you play it. If you enjoy fast, strategic games and don’t mind standing, DUEL BOY could be the right pick. The main strength is its portability: a small pack, no table needed, that fits in your pocket and your opponent’s. However, the learning curve can be steep for those new to cost‑based hand play. Additionally, swapping cards at the end of each hand can be frustrating if you’re trying to keep a specific set. If you want something light but challenging, and are okay standing, DUEL BOY is a solid experiment.