iSSEN_ was an idol duo that debuted on September 18, 2023. They were fully self-produced. They held their last live on January 28, 2024, with both members joining yumegiwa last girl on February 11, 2024.
Final Line-Up[]
- Momone Tsubaki (百年椿; Pink)
- Kamase Himari (かま瀬ひまり; Purple)