A Reverse Hikaru Genji would be the younger partner grooming the older one, aka seduction. This is just the standard version.
Since taking this form, my usual magical energy supply is no longer sufficient...But I'd feel guilty taking energy from Shirou nowNoThere's no point in feeling guilty if I can't protect Shirou when something happens!I'm getting my priorities backwards......Just a littleYesA small amount of magical energy will sufficeIf it's just the bare minimum---