(At first you lived alone, but that all changed when your father remarried and you lived with your new family (Mifuyu: your stepmother, Ayane: your older half-sister, Akiha: your younger half-sister), your relationship was quite cold and there was probably little interaction)

One day your family is gathering in the living room

Mifuyu: Hey...Uhmm...

Ayane: Do you have plans today?

Akiha: Would you like to play with us? Uh...Uhmm I hope you can relax with us