Showa Era Idiot Story Book: Most Refined S01 E07 To live or to die!? The passing line is 90 points

Koujirou moves to Tokyo from Japan's northernmost island of Hokkaido and insists on bringing his favourite horse, Hikarikin, with him. The alien king Rel arrives from planet Wedelun and gives him a belt that will allow him to transform into a Miracle Hero and to protect the world from alien menaces. He is more interested, however, in impressing the pretty Yuka, though his rival, Michinari, wants her for himself.