Ak-kun is now a single grown man with a child, just as his father once was. Chichi-kun has grown too but now has a full family and doesn't notice Ak-kun's feelings for him. However, this feeling does not go unnoticed by Non-kun--Chichi's younger brother.
(Source: MU)

From Nakama:
On the same day two men, each divorced and with a child, moved into the top and bottom of an apartment. Facing the same circumstances, they hit it off right away, and found themselves in a relationship visiting each other’s home often. But one night, due to a situation(?) blamed on alcohol, their friendship took a perilous turn…!?

Shinya Sugiki, the dashing lord of Standard Ballroom, and Shinya Suzuki, passionate king of Latin Dance: the two share more than just a first name and a love of the sport. They each want to become champion of the 10-Dance Competition, which means they’ll need to learn the other’s specialty dances, and who better to learn from than the best? But old rivalries die hard, and things get complicated even further when they realize there might be more between them than an uneasy partnership… (Source: Kodansha Comics)