Takasugi-san no Chibiyan Hero - Vol. 1 Ch. 86 - Said Twice

[MangaDex]

 

[nobodygattaknow]

But didn't he actually just fall?

 

[justforthelulz]

@nobodygattaknow
Yeah, but his reputation as the infamous delinquent "Mad Dog" precedes him, so everyone else just thinks he got into a fight with a really, really, really, really, really strong opponent.

 

[nobodygattaknow]

@justforthelulz my brain is so small I can't tell if he's trying to hide it or not since last time he told Koyuki to not tell anyone

 

[trenslime]

Pretty sure he doesnt want to say he slipped and fell on a gachapon pod while hanging out with elementary school kids.
The fact that he fell wasn't the embarrassing part

 

[Randomobscurity]

@nobodygattaknow Last chapter(or before that) it showed that flashback where his arm was stinging from the calvary team event. He doesn’t want Koyuki to say anything because the injury was probably from that and the fall just made it worse. Because then it might make everyone else feel bad if they found out only he got injured.