Nazo no Kanojo X, Seishun Buta Yarou wa Bunny Girl Senpai no Yume wo Minai Recommendations
These shows are very, very similar. They talk about strange phenomena that nobody can really explain (the spit in NKX, puberty syndrome in SEIBU). The main couples are similar although Sakuta and Mai are more calloused that Urabe and Akira, not so innocent. School plays a large part in both shows, as it sets the background and atmosphere while also serving to better explain the relationships the characters have.
These are both excellent mystery romances that are definitely worth your time.