就读于英知大学的世次爱（工藤美樱 饰），遇到了被丢弃在垃圾场的美丽女子古桥琴叶（尾碕真花 饰）。爱把捉摸不清的琴叶邀请到自己家里，以此为契机想和她成为朋友，但是这个提议被无情地拒绝了，并且爱知道了琴叶是改名后的名字。那样的琴叶代替提议的是，在猜中她真正的名字之前做“恋人”。然后， 在临时开始的交往中，如果猜中了她的本名，就会按照约定成为“朋友”，这是一个奇妙的赌注。爱没有后退，决定赌上这个赌注，和琴叶以“恋人”的身份笨拙地加深关系，但隐藏在她名字里的过去对现在露出獠牙...

本剧改编自实际发生的著名杀人事件，讲述了断言“不谈浮躁的恋爱”的大仪见，自信满满地说“恋爱经验丰富”的梦川，对恋爱的立场完全相反的两个人时而碰撞时而烦恼，然后痛快地逼近犯人。

本剧描绘了优柔寡断、不起眼但温柔的大学生·木下和也，因为被交往一个月的女友甩了，赌气登入出租女友，与水原千鹤约会的开始租赁的恋爱故事。

"Lie Eater -Ranko Kurama/Takaomi Kaji-" is a four-episode work that focuses on Takaomi Kaji and Ranko Kurama, who appear in the movie. Sano plays Kaji, a young man who challenges "Seven Poker," a game that triggers his growth as a gambler, and Shiraishi plays Ranko, a sadistic female group leader who faces his past enemies again for the sake of his best friend.

"Lie Eater -Ranko Kurama/Takaomi Kaji-" is a four-episode work that focuses on Takaomi Kaji and Ranko Kurama, who appear in the movie. Sano plays Kaji, a young man who challenges "Seven Poker," a game that triggers his growth as a gambler, and Shiraishi plays Ranko, a sadistic female group leader who faces his past enemies again for the sake of his best friend.