Inoue Satou

Sugiki, a standard ballroom dancer, offers to teach ballroom dancing to Suzuki, a Latin american dancer, in exchange for Suzuki teaching him in return. Their names are similar, but their personalities are totally opposite, just like their dance. When the two meet, something's bound to happen!

Okabe, who works in the Mechanic Department and has a hard time remembering people's names and faces because of horrible past love experiences, is gay. One day, when the Sales Department's and General Affairs' smoking area is under construction, they gather in the Mechanic Department's smoking area. On that day, Okabe can feast his eyes on the men wearing suits, but why does he suddenly remember the one night stand partner he met at a bar!?

Ak-kun is now a single grown man with a child, just as his father once was. Chichi-kun now has a full family of his own, and he doesn't notice Ak-kun's feelings for him. However, these feelings do not go unnoticed by Non-kun – Chichi's younger brother.

On the same day, two men, each divorced and with a child, moved into the top and bottom of an apartment building. Facing the same circumstances, they hit it off right away, and found themselves in a relationship visiting each others' homes often. But one night, due to a situation blamed on alcohol, their friendship took a perilous turn?!