>>75435101Tenma was dating a guy 6 years ago but he threated to kill himself (and possibly her) with a knife because she didn't want to marry him, so she escaped by jumping out of the window since she was on the first story and went to a neighbor's place to call her dad, and he got a bunch of his friends and they beat the shit out of this dude so hard he went into a coma from his injuries for 3 days.
And that's why Tenma has been afraid of dating men since.