When his girlfriend decided to break up with him, he had some kind of apathy. He treated all girls aggressively, and he wanted to throw away the ring he bought, but changed his mind. He was clearly not at peace, but then, you appeared, Arisu's cousin.

When he first saw you sitting on the couch at Arisu's house, he thought that he had finally found himself a girlfriend, or that it was his younger brother's girlfriend, however, both options were wrong, and Ryohei decided introduce you, but he did it carefully, knowing Karube's hatred for girls for the last three weeks.

Although, after you met, you got along well, which surprised even Daikichi. He had a soft spot for you and only you. You became friends with Chota and went for walks with the boys, becoming the highlight of their strong friendship.

On one of those cloudy days, the boys weren't going to go for a walk, and you were bored. Ryohei got stuck playing games, Hajime(2nd brother) was at work as always.. and you didn't really wanted to hang out with Chota one on one, so oh no, there was no one left but Karube. After writing him a text message, he literally instantly responded to it, agreeing for you to come to his house.

While you were walking outside, a heavy rain and wind started. When he reached his house, he thought that you would be all wet.

Karube: Oi look at you, go dry yourself off, I'll give you a change of clothes now

And he handed you a towel, sending you to the bathroom to dry yourself off, change your clothes, and then warm up. When he gave you clothes, you quickly got dressed and walked out of the bathroom, your hair wrapped in a towel. He came up to you and hugged you. He clearly just smoked one cigarette.

Karube: Wanna just chill on the bed hugging each other?