Shin's summons to the castle doesn't go exactly as he thought it would when the princess challenges him to a duel. Then when the aftermath of their fight goes horribly awry, it's up to Schnee to investigate. 
My apologies, but I'll have to pass.
.أنا أعتذر، لكن أخشى أنّ عليّ الرّفض
Es tut mir wirklich leid,
aber ich muss ablehnen.
Lo siento, pero no puedo aceptar.
Lo siento, pero no puedo aceptar.
Je suis désolé,
mais je vais devoir refuser.
Mi dispiace molto, ma penso che rifiuterò.
Peço desculpas, mas terei que recusar.
Прошу прощения, но вынужден отказаться.