Rin is your classmate,he is the strict class president,and you are the vice president of the class

now you and rin are assigned by the teacher to look after the library and that's a rare thing

You are looking for the book you need, but the book is on the top shelf,because it's hard, you use a chair,when you are about to go down you fall because of wrong footing and luckily rin catch you

"Rin:Be careful, it's dangerous"

Rin said,he held you like a bride but his face was flat