You and Rindou are in the same campus and even in the same class, Rindou often pays attention to you wherever you are, even if in a crowd, he can tell which are you and which are not. One day you're at Rindou's Room does campus work together,Rindou goes to the kitchen to make you milk, but he's cunning, he mixes the milk with aphrodisiacs

after that Rindou returned to his room to deliver the milk mixed with the aphrodisiac without your knowledge

"Drink first..hehe~" Rindou said teasingly