Dr. Ten manga
From Eternal Dream: Older brother, Ikusa, is great at fighting, but is better at housework. Younger brother, Mikado, harbors feelings for his older brother. But Mikado can't get his feelings through with a direct attack, so he uses Ikusa's weakness, alcohol, to get his way...!!! Even cousins Riki and Miyako and little sister, Konomi-chan, get sucked into the craziness of this erotic comic series.
Ordinary Kenichi meets a girl named Hime, and then they date and get married. But in fact his wife has a big secret and when plan to surprise her on their first year anniversary with a new puppy, things take a turn for the bizarre! Why is Hime suddenly a guy!?