Basically, the gist of it is that the game has native Xbox 360/One (XInput) and DualShock 4 support, but the Steam controller compatibility layer breaks it.

Go to Steam -> Settings -> Controller -> General Controller Settings -> uncheck everything. Your controller should be working now.

Note: you can also do it on per-game basis, by going into Big Picture Mode -> Senran Kagura: Bon Appétit -> Manage Game -> Controller Options -> Steam Input Per-Game Setting -> Forced Off.

Go to Steam -> Settings -> Controller -> General Controller Settings -> uncheck everything. Your controller should be working now.

Note: you can also do it on per-game basis, by going into Big Picture Mode -> Senran Kagura: Bon Appétit -> Manage Game -> Controller Options -> Steam Input Per-Game Setting -> Forced Off.

Now this one's tricky. It probably works out of the box if you have the official adapter, but if you're like me and just using a standard Bluetooth adapter, then it's a bit more involved.

- Go to Steam -> Settings -> Controller -> General Controller Settings -> uncheck everything.
- Download DS4Windows[github.com].
- Run it once, install the driver, reboot your PC.
- Run it again, connect your controller over Bluetooth, it should show up in DS4Windows.
- Finally, click on the settings tab and check "Hide DS4 Controller".

Now, your wireless DualShock 4 controller should be finally working in-game. The only downside is DS4Windows wraps it to XInput so you only get Xbox button prompts.

Like I said, the game only supports XInput and DualShock 4. If your controller doesn't have an XInput mode then you'll have to use a wrapper. x360ce[www.x360ce.com] is a good one and supports many brands of third party controllers.