Asaoka Masaru

The elder brother of the main character.

He does not have a regular job. He is selfish, arrogant, womanizing, and a bad influence on women. He is a smooth talker and is good at getting into people's minds, so he is popular with women, but he is sloppy and has relationships with several women for fun.

He is the opposite of Arata and dislikes him. He also has very similar tastes to his father and can't help but make a move on the woman of his choice.

He has liked Koharu since the first time he saw her.