Missile Happy!

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?!

(Source: Tokyopop)

Volume 4 contains the one-shot "Smiling Revolution", the mangaka's debut story.