Both of the main characters, Hana and Daichi, are not as they seem, and there are many misconceptions that cause a number of hilarious situations. It's about 23 volumes (almost fully translated, but not quite), but the constant comedy makes it difficult to put down.
Some suggestions based on anime I've watched and manga I have read.
1. Gokusen Kimi Ni Todoke Strawberry Eggs
2. Freezing Ōkami-san & Her Seven Companions
3. Maken-ki To Aru Majutsu no Index To Aru Kagaku no Choudenjibou Mai-Hime Desert Punk (also has elements of number 2) Infinite Stratos Needless Slayers
I Also know of some good manga that fit those descriptions that have not been made into anime yet if you are interested.