[WHY. Sei's cheeks go red when she realizes what he's underlining and what he's asking about.]

I - uh - i-it's just a misunderstanding, really...!! She was my late brother's girlfriend and I... [HELP HER] I-I didn't want one of my bosses to buy her when we went to the red-light district, I couldn't just stand by and let it happen so I...!