Leon/Kamui S Support (Leon is cute! cute!)

Leon: .........
Kamui: What's wrong, Leon-san? You look troubled...
Leon: Nee-san.
Kamui: Is something worrying you? If its okay with you, you can always talk to me about it.
Leon: ...You won't leave me alone?
Kamui: Eh...?
Leon: Such a pathetic figure...I didn't want to show this to nee-san...
Kamui: That's... its not embarassing if its something to worry about.
Leon: ...You got it wrong. Since you asked, please leave me alone...
Kamui: I don't have the strength needed for this?
Leon: .........
Kamui:...I understand. I'll be leaving then.
Kamui: Although I might not have the power needed...you're always welcome to speak with me.
Leon: ...Sorry. As I thought, would you hear me out?
Kamui: Yes. Of course.
Leon: ...I don't understand.
Kamui: Don't understand? What do you not understand?
Leon: No matter how much I think of it, I don't see a positive outcome. This kind of thing, its the first time...
Leon: To take action would be a fool's doing.
Leon: But, I already...can't help but to act on it
Kamui: Leon-san... what are you trying to do?
Leon: ...Here. Nee-san...
Kamui: This is... a ring?
Leon: Yes. Its what you give to swear an eternal love.
Leon: At the time I bought this ring, at first...
Leon: when i heard we we're not blood-related, my heart felt so happy.
Leon: ...Won't you accept this ring? Nee-san...
Kamui: !?
Leon: ...with regards to nee-san, It seems I'm in love.
Leon-san...!
Leon: Inside my head about nee-san is only...how you're so lovely that its unbearable.
Kamui: .........
Leon: It seems I've troubled you... Im sorry.
Leon: But I could not help but to tell you how I feel.
Kamui: ...Thank you. Leon-san. This ring...is it alright if i accept it?
Leon: !? Nee-san...
Kamui: I too... share the same feeling as Leon-san. But I did not have such courage to say what you've said... As I thought I'm a useless older sister, huh. But from now on, I will be more firm with myself. ...to be a woman worthy to be by your side.
Leon: No. You're already firm enough. But from now on, we'll always be together. And to perpetually improve ourselves.(I'm not sure how to phrase this one its  もっとずっと、しっかりものになるさ。)
Kamui: Fufufu... I look foward to it.
Leon: Nee-san...from now on, please treat me well.
Kamui: Yes, Leon-san.