A player's League is determined by their League Score.
The League Score can be increased by winning League Matches.
However, it is decreased when losing a League Match.
※If a player wins against an opponent with a much higher League Score than them, the League
Score obtained will be much higher due to a bonus
※A player's League Score will not decrease when losing in League 1; however, as players progress to higher Leagues, the loss of score increases when losing.