Hakarena Heart: Kimi ga Tame ni Kagayaki wo

High schooler Yukari is confronted out of nowhere by a boy insisting she stole a precious stone from him. Before she can say anything, a second man on horseback sweeps her away from the first. Yukari has no idea what stone they are talking about — but more pursuers keep appearing, all after the same object she has never seen. Caught between strangers with dangerous intentions, she has to figure out what is going on before things get worse.