2001—The name "P・o・r" changed as "Por". Momo joined I've Sound.
2005—Live concert in Nippon Budokan (I've in Budokan 2005: Open the Birth Gate)
2006—Momo graduated from I've Sound and continued her singing career with her group Por.
2009—Por breaks up and Momo, who changed her name to Hitomi Momoi, her real name, stars her solo career and publishes her first single, "Yuudachi". In this single, she counts with the collaboration of Atsuhiko Nakatsubo and Fish Tone, former I've Sound instrumentists. The single contains two songs: One of them is the one that gives the name of the single and the B side's title is "Hanausagi".