Kakkou no Iinazuke (A Couple of Cuckoos) 12 (Weekly Shonen Magazine KC)

[Machine Translation] Only Sachi knows the truth about the kiss. Nagi is going to participate in " -1", the highlight of the festival. Legend has it that the winning pair will get married...! Nagi Unno is a sophomore in high school at a prestigious private school, where she was mistaken for a boy when she was a baby. One day, she runs into Erika Amano, a very young high school girl who is on her way to meet her daughter-in-law, and half-heartedly asks her to pretend to be her boyfriend. However, they had no way of knowing this at the time. Erika is a child who was mistaken for Nagi, and Nagi is Erika's fiancee. ...... A romantic comedy of intertwined lives begins with "Misplaced Child"! What is the truth behind the "kiss" that only Sachi knows? Nagi finally comes back to Amami House, but she can't make eye contact with Sachi.... Can they be "close siblings" again? When Nagi came to school for the first time in a while, she was chosen as the class representative for the main event of the school festival, known as " -1". How true is the legend that the winning pair will be united? This fall, youth is at its peak!

幸のみぞ知る、キスの真相とは？　文化祭の目玉“М－1”に出場することになった凪。優勝したペアは結ばれるという伝説が…！？赤ちゃんの頃に取り違えられ、今は名門私立に通う高校 2年の海野凪。ある日、これから許嫁に会いにいくという超お嬢様女子高生・天野エリカと偶然出会い、彼氏のフリをしてくれと半ば強引に頼まれてしまう。だが、その時の二人は知る由もなかった。エリカは凪と取り違えられた子どもで、凪はエリカの許嫁相手だということを……。「取り違え子」から始まる人生交錯ラブコメ開幕！幸のみぞ知る、“キス”の真相とは？　凪はついに天海ハウスに帰ってくるも、幸と目を合わせられずムズムズ…。もう、“仲の良い兄妹”には戻れない？　久しぶりに登校すると、凪は文化祭目玉行事、通称“М－1”のクラス代表に選ばれていた。優勝したペアは結ばれるという伝説の真偽はいかに――。この秋、青春最高潮！！