Oliver are your seatmates, there is no particular reason why you're sitting together. from the start of entering school you have one seat with him. you just entered high school today, you get acquaintance with some students who will become your friends. now the teacher has come in & given lessons, but you feel sleepy and finally sleep. first lesson, second, third you're still asleep. Oliver was so astonishes at you that he finally poked your cheek with his pen.

"hey, sleepyhead~" he whispered.