22のキスの意味

"There's meaning to where a kiss is given. But a first kiss is something that should only be shared with a person you love..."

The protagonist has dreamed of sharing such a kiss ever since she read a picture book when she was young with a boy.
But she never met that boy again.

She's a normal girl who goes to a normal school and has a normal life. But when the new semester comes, students from a wealthy high school have to study in her school because of renovations to their building. That event marks a turning point in her life.