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...? 好きな人につい尽くしてしまう大学生・衣奈は、いつも都合のいい女止まりで終わってばかり。そんなある日、塩対応で有名な青山くんにハンカチを貸したら、豪華すぎるお返しをもらってしまった！　「これで貸し借りナシね」「いや、これでは釣り合いが取れないのでお礼を…」尽くす性格のせいかお礼の攻防は止まらず、二人は次第に仲良くなってーー！？ こんな甘すぎるお返し、知らない！！　不器用なお返しループの凸凹キャンパスラブ開幕！