Doko ga Ike nai!?

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.

(Source: Sanwa Shuppan, translated)