Hakarena Heart: Dare ga Tame ni Kimi ha Aru

Yukari is walking home from school when a boy blocks her path and demands she return "the precious stone" she stole. She has no idea what he means. He grabs her. A second man on horseback arrives and pulls her away from the first, also demanding the stone back. Yukari is screaming that she does not have it. This is her life now — men keep appearing, all claiming the same stone, none of them willing to believe she does not have it, and none of them explaining what it actually is or where she is supposed to have gotten it.