电视动画《新妹魔王的契约者》改编自上栖缀人原作、大熊猫介负责插画的同名轻小说。“你曾说过想要妹妹对吧”，向高中生东城刃更宣布再婚的父亲，带了两个成为他继妹的女孩回家同住，结果自己却跑到国外出差。澪与万理亚两名少女在父亲离开以后，态度一百八十度大转变，还打算征服刃更。想不到两人的真正身分，分别是新科魔王与梦魔。但是在跟刃更缔结主从契约的时候，居然出槌变成逆契约，刃更反而变成主人了。
为了追求自己的“兔”生意义，年少轻狂的比得（詹姆斯·柯登 James Corden 配音）踏上了背井离乡的路并成功赢得老江湖巴拿巴的青睐、成为了团伙中的扛把子，怎料却将追随而来的昔日老友们推入死亡陷阱。 幡然醒悟后，比得化身“兔界阿汤哥”带领同伴展开海陆空三栖大营救。高空跳伞、水下救援、雪山速滑、快艇追击，无所不能。在这场冒险旅途中，比得收获了友情，理解了亲情，最终实现了自我成长，成为真正的“兔一哥”。
以主人公柾木天地为中心，世界观浩大的SF动画。最初在AIC社内并不被看好，但通过系列生父梶岛正树的不断努力，最终成为了全方位的大人气作品。 现OVA共制作三期。
In the eighth and final season, our beloved Bridgeton teens tackle new challenges as high schoolers such as: driving, drugs, sexual inexperience, enthusiastic consent, porn and the teenage mind, cancel culture, their changing bodies, and (in the end) fear of the looming future. Through it all, friendship is the cornerstone for surviving this time of life – whether one’s puberty is just beginning, like for Nick who gets his first growth spurt, or near its conclusion, like for a maturing (and prematurely balding) Andrew. At the height of the season, when many of our characters are in crisis, Compassion (personified as a new creature voiced by Holly Hunter), emerges as a crucial way forward. Ultimately, though, this season is about the importance of sticking by and supporting your friends, especially when life gets overwhelming and messy. In the end, our kids step into the harrowing unknown of the future, made less afraid of what’s to come because they have each other.
