No Reason to It

"No Reason to It" (理屈じゃない) is a short story from Gamers' store privilege for volume 4 of 2nd Year arc of You-Zitsu light novel series, together with other three short stories.

Summary
On the 10th day of the uninhabited island exam, in the morning, Mio Ibuki goes to Kiyotaka Ayanokōji's tent to confirm something while he is away. After finding and opening his backpack to check, she finds that he only has a single 500ml bottle of water. Kiyotaka comes back and sees Ibuki, startling her. He asks if she looks at his tablet or wants something else.

Ibuki denies being a thief, then questions Kiyotaka about their 'fair trade' the day before. While he does not have plenty of water, Kiyotaka has given her 2 bottles of it in exchange for some rations. Ibuki thinks Kiyotaka wants her to owe him, but he points out she wouldn't have known about it if she hasn't checked his backpack, making it still a fair trade. Ibuki says she can't accept that and claims he will get nothing in return.

Kiyotaka asks whether she would've given him anything even if she owes him. Ibuki replies no immediately, as there is no reason to it and she just hates him.