Also known as: ミサイル ハッピー！; ミサイルハッピー!; 爱上替身女友; Missile Happy; Overly Sentimental; The Boyfriend Beside Me; Yêu Người Thay Thế Cô Dâu (vietnam); Missile Happy! (German)
From Tokyopop: Mikako, our over-zealous heroine, has a sister-complex so strong she won't let just any man wed her sister. On an undercover investigation to learn more about the newest bachelor, she ends up moving in with him! Plus the guy is a highschool kid just like her! Mikako's relationship with him starts to grow. What'll happen between Mikako and him?!
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