Both shows feature self-made women who take in a wayward man. The male leads in both shows are former Tokusatsu stars. Both also feature an office setting, though Oshi no Oujisama focuses more on otaku culture.
Both are BLs with sweet, yet awkward couples. Both shows have a popular cool guy who is secretly pining for a socially inept nerd. I think if you like the humor in Cherry Magic, you'll enjoy what Crank Up Hen has to offer. Crank Up Hen gently pokes fun at workplace BLs like Cherry Magic.