I think many people on here have not properly read the article, or made up their mind what they thought in advance.
The boy is allowed to tell ‘his truth’ just as much as the girls. And he has been apologetic and remorseful about the one girl, and denied the others. The idea that, in a school environment , 5 people saying something makes it true is not reasonable. That is the age of friendship groups where backing your friends up is far more important than the literal truth. All parties were very young.
That whole school environment sounds quite toxic to me. No touching rules are very sensible and clear for all. How some boys can be sitting with their hands consensually on girls’ thighs is hard to imagine. But, if that was the case, it is easy to see why the boy thought that to move beyond friendship, it was reasonable to try his luck and if the girl said nothing, it was consensual.
the idea that this is a police issue is risible. It wouldn’t pass the most basic test of evidence, not is it clear that a crime was committed .
Anonymous internet groups such as EveryonesInvited are great to show up institutional misogyny and to open up discussions on consent. They have marked a sea change in how seriously schools deal with this issue. However teenagers targeting other teenagers through smears and innuendo with zero consequences to themselves is a dangerous place to go.