The battle to decided for the time divergent change between the two time traveler is over and I'm glad Wagatsuma didn't go after Gaku's dad after that.. It's also shows that Gaku still have a long way to go to become the strongest in Kumine. If this battle eventually happened in 2022, the conclusion is clear.. Gaku won't rule Kumime until after Wagatsuma graduate before him, since Wagatsuma is one year older xDD