Military action
After spending the night together, Hara begs Jakharo to tell her how the Star Steel weapons are created. Although it's a Meteor Clan sacred secret, he's stupid and he tells her. A Darkforest Tribe patrol then appears and Hara reveals she's been working for them. However, they leave him alone, safe and sound, and he goes back to his Clan.
After he confesses his crime to the Clan, his knife is immediately taken from him and Jakharo is confined in a cave, rankless and hated, awaiting to be judged for the highest treason crime possible.