Karakai Jouzu no Takagi-san 2

The same sequel that involve weak guy to very assertive girl and the guy's life is never the same again, except in Karakai the guy there was still pathetic cu'z he still uses the same tactic that hasn't produce any results , while in Ijiranaide the guy there just does nothing to keep very assertive girl away from him.  

It is very similar to Skilled Teaser Takagi altho it has a Harem but the male protagonist blushes like crazy in this Anime which is Similar in Both these Anime 

As the episodes go on, I have noticed some behaviours and plots similar to this show. Watch it and see if I'm wrong because I'm not imagining it, aren't I? [Added this season as well because I can't remember when some of these behaviours happen. DM me if you have watched the show or you want the spoilers]. 

The same plot where girl comes to guy and guy finds girl annoying, but loveable. 

- Young protagonists - the MC doesn't recognize his feelings for the girl and sees her as an "opponent" to compete against at first - both shows have comedic elements - both shows depict very cute, innocent, wholesome romances with a similar feel  

Both are feel-good kind of slice of life/romance anime. Both of them have a very different appeal but you would enjoy watching one if you loved the other. 

- Both shows have a shy main character, except it's a girl in Kimi ni Todoke - Both "couples" take forever to develop their relationship with the difference that in Kimi ni Todoke they actually GET SOMEWHERE - Both include lighthearted comedy.