Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~

This chapter takes place immediately after Sento obtains the Fullbottles from Hokuto and Seito in Episode 21, but one week prior to the scene where Build charges at Grease at the proxy duel. This episode features the debut of Build's ToraUFO, KirinCyclone and KujiraJet Best Match forms and Hell Bro’s.