Mizuno and Chayama is my first Yuri Manga I've read. I definitely enjoyed reading even though at times I gasped in heart ache for the one of the main characters. 

This books contains triggers for those who have a hard time reading about heavy physical abuse, sexual a sault and heavy themes of surviving school, surviving bullies, surviving abusive and emotionally absent parents. 

With all that negativity there's so much space invested in a love between two students, and their need for each other during these hard times. They find comfort in knowing that one day they could be together without the need to hide from their parents. 

Now, I didn't get the impression that they were hiding because they are both girls but because both Mizuno and Chayamas family are rivals. They didn't want the families or anyone to know because that would cause more tension between both families and the public. 
Highly recommend