Manga by author Sakurai Norio - Status ongoing

The somewhat precocious and sadistic girl 'Mitsuba', the somewhat lecherous muscle girl 'Futaba', and the somewhat mysterious girl 'Hitoha'. Better known as the (mischievous) "Marui Sisters", this is the story of how these three triplets go about their days in Class 6-3 with their cute yet wild antics.Here is the spin-off: Hobo Shuukan Mitsudomoe

Chitose Morishige is a 12-year-old seventh-grader without a friend in the world. Her father, Professor Morishige, built a robot companion for his daughter to ease her loneliness.The only problem is that Ichika Robata, the android, is so lifelike that Chitose believes she's a normal human girl who either ran away or was kidnapped by her father. Ichika attempts repeatedly to prove that she's a real robot, with hilariously disastrous results.Published in Weekly Shounen Champion.