Marimo Ragawa first started submitting manga to comic magazines when she was only 12 years old, which is when she was in 6th grade of elementary school. She continued to send her manga to the same magazine for four years, but a positive critical reception was yet to come. Ragawa then decided to switch to a different magazine. Surprisingly, her first submission to this magazine, Hana to Yume, won a prize called the Top-prize (トップ賞). Two years later, she succeeded in achieving her debut with her first manga, Time Limit.
Marimo Ragawa's calm and cute design is one of the traits of her drawings. Her energetic drawing and characters are very attractive, even to non-manga readers. She is widely known for her great ability in describing complicated emotions, especially in New York New York and Baby and Me.