青山くんの甘すぎるおかえし

Synopsis

University student, Ina, who is always devoted to the person she loves, always ends up being a convenient woman. One day, she lends a handkerchief to Aoyama-kun, who is famous for his saltiness, and receives an over-the-top gift in return! "No, this doesn't balance out, so I have to thank him..." The loop of repayment doesn't stop because of her devoted nature, and the two gradually become friends...?