Idle Hands | How to Play

About Idle Hands, from BoardGameGeek:

In the must-follow trick-taking game Idle Hands, a.k.a. 悪魔でお仕事, the lead suit is determined by an extra card played to the trick from among a player's face-up mission cards. The highest card of the lead suit wins all the cards, then adds the mission card to their hand! Every trick is worth points, but this isn't necessarily a good thing since the 4s and 8s are worth their face value in negative points. At the end of the game, whoever has the most points - or, more frequently, the fewest negative points - wins!