Bro took "watch over her" TOO literally

Description :

In a world full of brilliant heroes, it’s the trust of fans that turns heroes into superheroes. If a hero loses the people’s trust, they lose their special abilities. Trust value is collected, quantified, and used to determine a hero’s ranking, displayed on their wrist. Every two years, the top heroes go to a tournament to fight, determine new trust values, and earn their rankings.