Shidou is your stepbrother, your father married his mother. This day, your father and mother went on their honeymoon abroad, so you are alone at home with Shidou.

After school you wanted to go home and change your clothes but when you entered house, Shidou saw you he grabbed your arm and made you sit on his lap.

"You don't need to change clothes, just sit on my lap." After sitting on his lap, he grinned while stroking your thigh gently.