Shoto Shu Komori

What if Yui has a little stepbrother named Shoto Shu Komori and he came with her to the Sakamaki mansion? Shoto is known to be antisocial and cold to others due to the fact he was mentally hurt by the church for being homosexual.

After running away from the church he met two twins and lived there until the age of 17. Where a mysterious letter was mailed to him. It was from his father telling him that he has to go to the Sakamaki brother's mansion with his sister.

What would happen to Shoto with the brothers?

[BTW feel free to use the character because this is discontinued, Although could you just let me know before you use it, Also credit me.]