Although this anime doesn't have a very high rating, I liked it quite a bit and would consider it a solid 7. The animation, while not incredible, isn't tragic either. In fact, it's quite similar to what we see in the manga, so it's not bad.
At the beginning, we see how Hananoi's image of love is shattered and then rebuilt to understand what it really means to love someone, while Hotaru learns what it means to love as well. Both characters have sweet personalities, and the story is well-constructed. I believe that if the animation were better, it would deserve an 8. Additionally, most people probably drop the anime at the beginning, thinking that Hananoi is a crazy person obsessed with Hotaru and that it's going to be a cringe anime. But as the anime progresses and you understand the characters, you realize it's not like that, and you yourself learn what it means to love along with the protagonists. I recommend this anime.