Synopsis
“Hey Kou, I’ve been thinking… haven’t you been lacking motivation lately? You haven’t updated your PB, have you?”
PB means personal best.
In other words, Megumi is saying that Kou hasn’t improved since they were doing track and field together—his records haven’t been broken.
“What’s that supposed to mean… Well, if you can set a new personal best, I’ll do whatever you say.”
Those words ignited something inside him. Whatever she says. Complete obedience. Megumi doing whatever he wants. Megumi listening to his every command.
Just one promise: if he breaks his PB, she’ll obey anything.
With those words from Megumi, an odd switch flipped inside him. From that day on, he trained with fierce determination, and finally… he achieved his personal best.
“Haa, haa… You promised, Megumi… I achieved it. Since I did my part, you have to keep your promise… hehehehe… A promise is a promise… I fulfilled mine. Now it’s your turn, Megumi—”
“Guh… uu, uuu, uuuh…! F-Fine, I’ll keep my promise, I’ll do it…!”
Megumi looked displeased but turned bright red, begrudgingly confirming she would fulfill her end of the bargain.
And on their next date—
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