Song Qingnan was betrayed by her ex-boyfriend, and when her younger brother suddenly needed expensive medical treatment, she had nowhere to turn and signed a contract with Xie Zhi. As they spent time together, the boundaries of their agreement slowly dissolved, and feelings began to grow. But due to Xie Fubai’s malicious rumors, they were forced apart. Over the next two years, Xie Zhi cleared every obstacle in his path, determined to win back the woman he loved; meanwhile, Song Qingnan transformed through hardship and achieved her own independence. In the end, Xie Zhi publicly expressed his feelings and recognition for her. After working through all their misunderstandings, they moved toward each other and finally became a true couple.

這個世界裡，人類被視為劣等種。 冒險者小隊「種族會」中負責扛行李的人類少年‧萊特，在世界最凶險的迷宮「奈落」深處遭夥伴放逐，甚至想取他性命。 　　為了在「奈落」活下去，萊特自暴自棄地用了唯一的技能《無限扭蛋》，結果竟召喚出強大無比、「等級9999」的伙伴們──！ 　　之後過了三年，萊特自己也升到了等級9999。 帶著對自己忠心耿耿又懷有好感的美少女們（而且所有人都是等級9999），他以壓倒性的力量開始進軍地上!!

兩個職業冰球運動員是球場上的死敵和互相欣賞的對手，但私底下相愛了，起初，他們想把這段讓人困惑的複雜感情對全世界隱藏起來。