Generator Gawl (1998)

Gawl, Koji, and Ryo, three young scientists from the future, time travel to early 21st-century Japan to stop a terrible threat from undoing civilization. As they fight against time, their quest disrupts the lives of the townspeople, and the trio must use their incredible intelligence, along with Gawl's unique abilities, to protect their identities, their friends, and their future.