34x18 - Kamen Rider

Houtaro and Rinne are disappointed in a world where not only the Alchemy Academy, but also their teacher Minato does not exist. The Moon Malgam then appears in front of the two and mocks Rinne where it takes her into the shadows. "What should I do to become stronger and defeat the Moon Malgam?", asks a worried Houtaro. Gotchard Daybreak then replies. "I will transport you to the past." Just what is in Houtaro's past? What should he do there?