[He frowned softly in thought at this. Maybe Tsuna had figured it out? But. . .Thinking back on it. . . through the haze of pain. . .even he had noticed Tsuna acting. . .not entirely like himself.]

" . . . I think it might have caused you to be like this. My own flames had turned on me - utilizing the destructive properties against my self. . .and suddenly you're feeling incredibly fatigued. Similar to the effect rain flames have. I doubt this is a coincidence."