This is a story about a group of five good friends who are the same age and who live in the same apartment building owned by their parents' company. Among the five, there's Kanna, an extremely lively girl who prefers to daydream about fun things than to fall in love. One day, one more girl with the same age came to the apartment building. Now the group has one more member! Or so Kanna excitedly hopes, but...?!