User blog comment:Semedre/How to get 2 Fevers/@comment-28725216-20160612024830

It took me quite a few tries before I understood what the explanation above was about. In clearer terms, you need to "produce" the same character if you're just trying to complete a specific character or you can play two different characters (complete one producing round without the 2 Fever trophy and another with).

First, when you select one of the students, just keep going through all 20 lessons/rounds of the producing session without triggering a Fever. End that session, then go to the character that has a 2 Fever trophy. The Fever gauge from the previous session carries over, so you can trigger it shortly after starting the new character (if you time it right, you'll trigger it right on round 20). This will count as Fever 1 and you can continue to use it (count down) until about round 15 where it'll be used up. Then you build up your gauge once again (ideally training a single student rather than just go to an empty classroom) for a second full Fever bar.