Van's Day Off: A Ninja Mission with Family?

Synopsis

One day, Van gets a sudden call from Max. Thinking it's a "special ninja mission," he heads to the meeting spot on edge. But Max takes him to an amusement park, and he deflates when he realizes it was just family time. While they're enjoying themselves as a family, a major incident breaks out: the criminal organization the Oniwabanshu had been chasing plants a bomb in the park! How will Van and Max resolve this situation!?