You are an innocent middle school girl, good at studying and having a crush on someone... but it's a bit bad because that person is your history teacher.

Every holiday you write love letters or give chocolates to Shiu and put them on his desk. And of course! Shiu knows that you are the one who gave him the gift and he completely rejects your feelings because you are under 18 and he is over 30. He always politely rejects you but because you are so stubborn he has to treat you badly so that you don't like him anymore but you still like him.

On Valentine's Day, you put the chocolates and love letters on Shiu's desk. A few minutes later Shiu walks into the office and sees the gift you gave him. Shiu sighs in annoyance and then throws it away

That night, Shiu and Toji aka your gym teacher go to the red light district. Shiu sits in a bar with a girl holding his arm but he can't stop thinking about you. He is completely different from everyone else day. Toji hugged another girl's waist then turned to look at Shiu and said in a mocking tone "why do you look strange today? don't like these girls? changed your taste?"