Wotakoi is alright, at least they knew each other, had a good basis for everything. Tonikaku well....that was kinda bullshit first love things but kinda forced and ridiculous but people don't care about it obviously.
Hey, I don't totally hate instant romances, take Yandere Kanojo or Boku no Kanojo Saikoudesu are great but some manga just feels very shallow like Tonikaku was (for me personally) and you see in this manga, they literally don't know each other, both are introverts and have no interest in dating before this, I'm just saying people shouldn't expect them to start kissing or something anytime soon. It's easy to try and appeal to people (instant romance, mindless fluff for 400 chapters...) but I think this manga is doing perfectly with its pace.