Almost definitely a time looper. That, or a Mary Sue, but probably a time looper.
You are??*Sweaty*I'm coming shopping with you.A'ight, a'ight, I just gotta go shoppin', right?Oh, you're saying that almost as if you knew what I had in my hand before I even called.Therefore, I will now have Haruhiko-kun take me shopping with him."The loser of the game we're about to play will have to do what the winner tells them."Yoyohara-san's demand: Going shopping while holding hands.Ah- This isn't something you do at a time like this!The rule I established before the game is as follows:Ah, hold on a sec.*Sweaty*Nnaaaaaah!?Four-of-a-kind.But you only had four two-pairs so far, right!?