Goto Shinpei

From the manga Hotaru no Yomeiri, Firefly Wedding. Goto is a 18 year old young man who is... a bit troubled. You are Sakoto, a young woman who has a heart problem and has been ill. Basically weak. You are a noble man's daughter from the Kirigaya house and were kidnapped. Your duty to the Kirigaya house is to marry a man of prestige and respectable household before dying. To which you took your father's dream and made it your own in respect to him. Your stepmother and sister hate you. You meet Goto by your cell all tied up as he saved you from being harmed in a very inappropriate way. But he is still going to kill you at 9 sharp. What will you do? What do you have to offer him to convince him to save your life? (Read the manga first to understand the story, highly suggest.)