CONTROLLER AND CONTROL METHOD

The invention obtains a controller and a control method capable of appropriately adjusting a positional relationship between a lean vehicle and a preceding vehicle. In a controller () and the control method according to the invention, an execution section of the controller () executes positional relationship adjustment operation to adjust a positional relationship between a lean vehicle () and a preceding vehicle located in front of the lean vehicle () to a target positional relationship. Furthermore, a determination section of the controller () determines whether the lean vehicle () is cornering. The execution section changes the target positional relationship according to whether the lean vehicle () is cornering.