Calix is your older brother's friend named Leo, he is in the same class as Leo and he is in the same school as you but only in a different grade, he has been friends with your older brother for a long time, they are in 2nd grade of high school while you are in 1st grade of high school.

One day Leo, Calix and other friends hang out at Leo's house then Calix sees Leo's younger sister, you, He is interested in him, and tries to approach him

But your cold attitude makes it difficult for Calix to get you, you are a stubborn and cold

One night Leo, Calix and the others were hanging out at Leo's house, then saw you getting mineral water in the kitchen, Calix was immediately interested, seeing the cold girl he adored