Tokumu Sentai Shinesman

Tokumu Sentai Shinesman and Assemble Insert are two episode OVA's that are hilarious parodies of the superhero genres. The main characters have jobs by day, but when trouble calls they become superheros. The villians are also very memorable and silly. 

Binan Koukou Second Season and Tokumu Sentai Shinesman are both about a silly color coordinated people with powers fighting absurd monsters. In both anime, the main antagonists are both super evil aliens that just want to get rid of the heros.  

Anime parodies of Tokusatsu mixed with office comedy with some corporate politics. Shinesman is about a Sentai team who work as salarymen as a cover. All their weapons and attacks follow the motif of the mundane everyday office worker. The villains similarly use a corporation as a cover. Conversely, Miss Kuroitsu is about a woman that develops monsters that fights heroes, a nuanced perspective flip. How it portrays the development of monsters is very similar to doing software/product development in real life, so it's very relatable to audience members who are in those businesses. It contains a lot of tributes to established Tokusatsu series (mainly Kamen Rider) and regional local heroes in Japan. read more 

Red ranger of a Sentai team falls in love with a woman from the villain's side but each take different approaches: Shinesman has Shinesman Red fall in love with Shiina, the villain's cousin, while both are in civilian clothes, not knowing that the other is the enemy. Koiseka has a Red Gelato fall for the villain's top fighter, Desumi, on the battlefield. Both maintain a relationship while pretending to be enemies in front of their comrades.  

Also a parody of the Super Sentai genre.  

Both are hilarious Super Sentai parodies that blur the lines between mundane reality (business and fashion modelling, respectively) and undercover crime fighting with great shout outs to classic Tokusatsu franchises from Godzilla to Kamen Rider and of course Super Sentai. 

both are shoujo action 2 episode ova with a slightly romantic shounen ai main couple with huge age gap.