I just thinking this trope but our OP MC is incredibly talented liar. Like everyone suspect him but his act so convincing everyone just buy it. Click to expand... Ever read Transfer Student Storm Bringer? It's kinda like that second line with how everyone thinks the MC is really strong but he's just REALLY lucky.
@Basic_human Ah I see, I usually don't either too but this one was a funny read so I thought to recommend it.
Or maybe Kokichi Ouma; an ordinary student who convinced the school into thinking he's a leader of a secret organization