Time Bokan 24

The history in our textbooks is completely wrong? In the 24th century, humanity invents a time machine called "Time Bokan." As they uncover the real past, they learn that everything they were taught is incorrect. To fix this, the government forms an organization called JKK. Tokio, an ordinary young man, is recruited by Karen, a girl from the future, to join the JKK. Together, they journey through time to uncover the truth, all while battling "Akudarma," a sinister group determined to keep history hidden.