@chrispower10 A misdirection, of course. She's in love with someone and wanted to take him on a date because she feels nothing for him, as practice for her 'real' love.
At which point this would be the prime time for some NTR, Kazuya "Well we better practice kissing too, at this love hotel where we'll change our clothes..." we could see Kazuya then bang Sumi until she forgets about the boy she wanted to impress...
Except that Kazuya has no balls and would be the one getting NTR'd.