Toujima Tanzaburou wa Kamen Rider ni Naritai

When mild-mannered office worker Tojima Jr. decides he's destined to become a real Kamen Rider –despite having no powers, no motorcycle, and no clue –he sets off on a chaotic quest that collides everyday absurdity with over-the-top tokusatsu action. From battling malfunctioning monster suits to surviving his company's soul-crushing meetings, Tojima's fight for justice becomes the funniest struggle of them all: growing up without giving up your dreams.

(Source: Titan Manga)