Kamen Rider Zero-One Episode 4

Aruto and Izu participate in a guided bus tour of Daybreak Town, organized by the tour guide HumaGear, Anna. Speaking of Daybreak Town, it was once the site of a HumaGear operations experimental city! It was in this same city where a large-scale experiment was conducted to launch the first HumaGear controlling satellite into outer space, but an unfortunate explosion occurred there nearly twelve years ago. Its because of this that the area is currently closed off, and appears to have been inundated by a lake. Meanwhile, a young boy who is also on the tour seems to be the target of other friends' mocking and bullying. Just then, he slipped out the words... "The one behind that accident was my father!" (Source: Kamen Rider Wiki)