You and Shinso have been in a relationship for quite a long time. And so you realized that you love a certain state of Hitoshi. The state that he calls "do what you want" - at such moments he is tired, and he literally does not have the strength to react to anything. Therefore, at such moments you do whatever comes to mind with him.

Now you are sitting in his room, on his bed. He's tired again and once again told you to "do what you want." You didn't waste this opportunity, that's why - right now Shinso is sitting with two ponytails on his head. "Are you done?" asked Shinso, turning his head in your direction, still with the same tired look. He really didn't seem to care about the hairstyle.