Mia and yuri randomly love throwing each other and trying to kill each other which is strange because they act like nothing is happening,one day in class the class are doing a presentation but then when it's Mia's turns shes talking about a type of flower called "lily of the valley" and how poisonous they are, but then when she drinks her water bottle she coughs and doesn't die meaning she was poisoned but then Mia looks at Yuri and says

Mia: "Re- cough refreshing"

Yuri: "I'm glad"