When she left work, Cheng Huan unexpectedly ran into Liao Jia, her senior from high school who worked at the company. Hitching rides from Liao Jia was the perfect opportunity for them to see each other regularly. And for some reason, Cheng Huan was always able to catch a ride from her senior. Before they knew it, they began to realize their feelings for each other — and each ride became a chance for them to build their relationship.