Hana to Akuma, Karneval Recommendations
Well Hana to Akuma is more romance, and Karneval doesnt have none of it
But Vivi and Gareki are way too similar even in the way they act. Also Vivi takes care and protects Hana and Gareki takes care and protects Nai. And Hana with Nai have also very similar to eachother.
Karneval is more gore and have fights and Hana to Akuma focus on the romance