Moujuusei Shounen Shoujo

high school student usami touru bumped into his classmate ayabe reri, one day while taking a stroll. ayabe is like an idol in their school. she is a usually a quiet and honest beautiful teenage girl. but by chance that night, touru caught a glimpse of her skipping on top of a rail. the next day, touru was asked by ayabe to keep what he saw a secret. how will the relationship of such an unlikely couple play out?​