Kakkou no Iinazuke (A Couple of Cuckoos) 6 (Weekly Shonen Magazine KC)

[Machine Translation] Nagi is in agony over the presence of Erika's brother. However, such fretting is blown away by a bicycle date with Hiro and a trip to the beach with the three heroines. Summer, it begins! Nagi Unno, a sophomore in high school, was mistakenly adopted by a different family when she was a baby, and now attends a prestigious private school. One day, she happens to meet Erika Amano, a very young high school girl who is about to meet her forgiven bride, 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 ex-wife. ...... A romantic comedy of intertwined lives begins with "The Misplaced Child"! Nagi is in agony after being informed of her brother's existence by Erika, and she storms into Erika's father, a hotel magnate, to find out the truth. However, her worries only deepen when she unexpectedly gets a fight back. However, her worries are blown away by a bicycle date with Hiro and a trip to the beach with the three heroines (in swimsuits, of course)! The perfect summer is about to begin!

エリカの兄の存在に悶々とする凪。だがそんなモヤモヤも吹っ飛ぶひろとの自転車デートに3ヒロインとの海旅行。夏、始まります！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！エリカから兄の存在を知らされ悶々とする凪は、真相を探るべくホテル王のエリカパパに突撃。ところが、思わぬ返り討ちにあい悩みは深まるばかり。だがそんなモヤモヤも、ひろとの自転車デートに、3ヒロインとの海旅行（もちろん水着）で吹っ飛んじゃう！ 最高の夏、始まります！