ベルサイユのばら
In October, 1973, after completed the long story "The Rose of Versailles" on the Margaret, she travelled to the Europe with her friend manga artists Toshie Kihara and Yōko Tadatsu () for about one month or one and half months. They reached and stayed at an old city of Regensburg by chance. There, Ikeda was inspired and visioned the stories of the music and romance which she could not fully express in "The Rose of Versailles".